And I liked Cap 1 as well. Especially the first half.
On Cap 1, I actually have no idea what the hell is up with that movie. The direction seems to derail entirely once he dons the 'official' Cap outfit- it seems like it purposely turns him into the guy that Steve Rogers, stage performer "Captain America" was supposed to be portraying but in a way that seems as showtime-y and disconnected as what was shown of the War Bonds performance.
The action goes from 'decently choreographed and tense' to ' 80s cartoon show'-like with Stormtrooper aiming meganazis who barely seem dangerous with the whole Cap and his Howlin' Troopers montage. They even have one of those kinda toy commercial bikes with gizmos and gadgets on it, haha.
Like, he kinda just stops being a heroic human being and becomes a flat out cheesy cartoon hero/icon in that latter half. It kinda makes sense on paper- especially given the few scenes where it's supposed to show that he does struggle with being the Captain America shown in propaganda (because he's a decent dude who believes in equality and freedom- which is hammered in throughout the entire intro section and why he's even chosen) but the way it's executed just doesn't feel right in terms of pacing and visual direction.
The whole ending fight direction is weird because of that too since Red Skull's whole deal is that he finds himself above humanity entirely, and that he IS the man shown in whatever propaganda- unlike Steve, who simply believes himself to be a guy with the means to help others and that they deserve decency equally as much as he does no matter the difference. Ultimately, that only barely plays out in the ending where Skull gets warped to Never-Never Land via Cosmic Cube because of that arrogance but there's never like a real 'clash of ideals' that you think you'd find in a superhero movie. At the very least pretty much every other comicbook movie has that in their conclusion to some major degree- Cap 1 is more like, "welp found the dude, time to punch each other to death"