The boys ending did the worst thing an ending can do.
Which is to make rewatching the show pointless. Pretty much every season was ramping up the tension of Homelander going full scorched earth, teasing it over, and over, and over, and it just never happens.
I've said it before, but IMO the white house fight should have been like episode 5. The boys try to take Homelander out, he gives that speech to the country, and they fail. He goes full scorched earth from there for a few episodes after realizing virtually no-one is gonna respect him as a god.
That would have been cool. Instead we got a fight in a room. It just makes all the other seasons feel pointless because they're about building to an event that never comes.
SPOILERS FOR BREAKING BAD
But it would have been like if the entire series of breaking bad was teasing Walt's demise, and Hank finding out. Only for the show to end with Hank and Walt as unsuspecting best friends, and seeing Walt retire on a beach. It would have ruined all of the setup from previous seasons.