When adapting a comic character onto the big screen, not everything will survive the process. Of course, that's not to say most studios, like the MCU, a massive and successful universe that others can't quite top strive to keep their characters somewhat comic accurate, making the heroes look and feel just like their counterparts.
However, there are times when, for reasons sometimes out of the creator's control, the characters are adapted somewhat poorly on a visual, not emotional, level. As such, while some adaptations rise above the rest and shine as true counterparts of the comics, others, for one reason or another, feel and of course look weak by comparison.
Better: Daredevil
Now, most fans when they hear the MCU typically think of the movies. However, the MCU does have roots set in TV world, even if it is loosely connected, like with the now-defunct Netflix series. On top of that, Daredevil gave audiences one heck of an interpretation of the hero that fans want back.
Opting for the original black suit, Matthew Murdock looks utterly intimidating, flying across rooftops, taking on baddies. Not to mention his upgraded and classic red suit that fits the character perfectly and defines who he is.
Worse: Iron Fist
Keeping with the TV series trend, Iron Fist has by many been considered the worst of the series. From the flat acting to poor storytelling, and of course the costume for Danny Rand. Or rather, the lack of said costume.
In the comics, Rand's costume is flamboyant and bold; a green suit with a yellow mask complemented by an epic dragon tattoo on his chest. All fans got was the tattoo and a brief look at the mask that didn't even try to make Rand look or feel like his counterpart.
Better: Captain America
When serving as the symbol for freedom and the embodiment of America, a spandex suit with a feathered helmet may not be the best way to depict that. Captain America's suit in the comics was that, a goofy attempt at making the character come to life.
Yet, the movies strived to make Cap different than his original counterpart. Updating his armor, making it more military and combat-ready, the new Captain America suit looks amazing and serves as a complement to the original costume that allowed for Cap's suits to evolve.
Worse: Quicksilver
Simplicity isn't always the best. Sometimes, audiences want to see the costumes shine, no matter how they look. For Quicksilver, there were a couple of options. From his classic blue suit to the green outfit, Age Of Ultron could've given Aaron Taylor-Johnson any of those.
Instead, it opted for a simple blue shirt and nothing more. Even when WandaVision gave Evan Peters rather than Aaron Taylor-Johnson the classic suit as a joke, it just didn't feel the same.
Better: Ant-Man
Making a guy who can shrink down and talk to ants work in the MCU is already a pretty difficult task on its own. Adapting the Ant-Man suit is equally as difficult. From the goofy antenna to the open mouth, the suit seems a little off.
So for the movies, the suit was changed, and this helped give the Ant-Man movies some fantastic scenes. The antenna element was dialed back, the mouth covered and the suit was made to look more realistic. Small changes, but influential ones. There is a reference to the original helmet in Endgame, as well.
Worse: Hulk
Given that the MCU has been around for more than ten years, many of the characters have gone through changes. When Hulk first started out, his appearence was simple: green skin, some kind of pants (preferably purple) and that was it.
Yet, as Hulk progressed into his Professor Hulk stage for Endgame, the feel and look of the character drastically changed. Gone was the big, green beast. In its place was a nerdy green guy wearing normal clothes and occasionally a funky jumpsuit. It was an underwhelming sight to behold.
Better: Falcon
Over the years, Captain America's had plenty of sidekicks; from Bucky Barnes to Jack Flagg and of course, Sam Wilson, The Falcon. Comic-wise, Sam Wilson's costume looked goofy. Because of the red-and-white, oversized wings, he seemed a lot like Vulture.
Like with Captain America though, the MCU updated Sam, giving him a mechanical and militaristic suit with wings. They'll even be adding in the old colors for The Falcon And Winter Soldier, and will be transitioning Sam from the Falcon to Captain America, just like the comics.
Worse: Drax
Look, Dave Bautista's Drax is one of the best characters in the MCU. He's funny, down to earth and his quotes have become legendary. Beyond that though, Drax doesn't look much like his comic counterpart, who sported green skin, and the purple cloak.
Beyond ditching the cloak and dulling down his tattoos, the MCU's Drax's skin is more of a grey, and the loss of the original costume lessens his character. Yes, he's still a fantastic character but as a comic adaptation, he doesn't look much like his counterpart.
Better: Vision
One of the best things about WandaVision was the comic accurate costumes for the Halloween-centric episode. Every character looked like their counterpart for better or worse, with Vision being in the worse category, face painted bright red and complete with yellow and green spandex.
The MCU version of Vision still takes inspiration from the comics but updates it for a modern setting. Taking away the spandex and making the android appear to have a more robotic look and feel to him while keeping some details improved the design greatly. Perhaps some other versions could be adapted and improved upon, too.
Worse: Hawkeye
Honestly, it shouldn't even be possible to make Hawkeye look worse than his comic counterpart. In the comics, Hawkeye traditionally wore a ridiculous purple suit with a cowl. Modern comics gave him a bit of an upgrade, giving him a suit with purple markings.
However, the MCU Hawkeye has none of that. No purple. No cowl. All it is is a generic black suit. Giving him his old cowl would've been better than the costume audiences got. Perhaps the upcoming TV show will finally give him costume he's due.