Most people think of the MCU as some big monolithic thing where "it's all connected", but the reality is that you can just jump in wherever you want/watch whatever you want without being lost.
A good way to illustrate what I'm talking about is the Avengers Quartet: a lot of the discourse leading up to the release of Infinity War centered around the notion of that movie being the culmination of 20 other movies' worth of storytelling, but the reality of the situation is that you don't actually have to have seen any movies other than The Avengers and Age of Ultron in order to both understand and enjoy Infinity War, and you also don't even have to have seen Infinity War to enjoy and understand Endgame.
Letting go of the notion of the MCU being monolithically intertwined actually helped me realize that I actually like more parts of it than I hate and even helped to mitigate the sense of formulaity and sameness that originally kept me away from most of Phases 2 and 3.
Some movies are more connected than others IMO. The Avengers movies of course but also Captain America 3 and 4. Ironically the MCU started off more stand alone and it wasn't until team up movies became more of a thing that it started to feel more connected IMO. I mean just look at the first phase or two of the MCU. The only connective stuff is basically limited to the post credit scenes.