Phase 2 ends with Ant-Man so that Phase 3 can start with Captain America: Civil War.

Why is it so special to people that it ends with an Avengers movie that they can't accept this?

It's not that ending with an Avengers movie is important, it's just that Endgame seemed like the end of a saga, so saying there's technically one more is just strange.

Same with Ant-Man, why introduce a character in the last film of phase? It's just a strange thing to do if you're breaking stuff into phases.

Not really. You can count is an post-credit-y movie.

I personally think that Spider-Man: Far From Home needs to be viewed as the final episode in the Infinity Saga because not only does it continue Spider-Man's character arc from Civil War, Infinity War and Endgame but it also serves as the series' way of paying respect to Iron Man, the character who has been the main protagonist for the first 11 years of its existence as well as sets Spider-Man up as its new main protagonist

I disagree with having FFH as the final episode, because it doesn't conclude anything, is a follow up, and not only that, it has a cliffhanger, that is not a way to conclude a 11 years saga. FFH falls in the middle of Phase 3 and Phase 4

I've always viewed the MCU as a gigantic television series, in which we've recently finished Season 1, and this helps me explain it better. FFH would be a much better season premiere (younger character, legacy of character who died in previous episode, big cliffhanger to hold interest, continue with some old characters and introduce some new ones, etc.) than a season finale (the only thing that has going for it that I can think of is that it focuses on Tony's legacy).

I would say we have finished Season 3, but yes, the MCU is just a gigantic TV series spread across all media, comics, films, tv shows and web series.

Based on what we have so far, I use sagas as season rather than phases because of concept of an overarching villain and story being told, something that typically (not always, but typically) gets changed each season. But I understand using phases, too.

Me. 100%