I'm also more of a fan of the characters themselves that's why I like the movies but don't read the comics. But as far as the X-Men in the Deadpool movies, they're all there just to be made fun of., they ain't gonna be faithful to the source material. Probably a payback for how X-Men Origins Wolverine turned Deadpool into Baraka.
I've been rewatching a few of the older MCU movies that I only watched once and just now realizing how much of Infinity War was foreshadowed beyond the Thanos cameos. Like in Age of Ultron Tony Stark said his biggest fear is watching everyone die and being the only survivor.