I'm gonna make this breif as possible: people love hating the show too much.
I'm not saying the show is perfect and has no flaws, but come on, for people to say, "Iris saying 'we are the flash' ruined the show", is a bit over the top. Yeah, it was dumb. Not the smartest move. Just ignore it. But people stop watching the show for that.
Season 5 may have not been that great, but it wasn't cringing or horrible, it just had loads of plot holes and some questionable writing. I didn't stop watching the show. It's not like the transition between legends from season 3 to 4 where it literally switched genre, it just had a bad season, or just some bad episodes.
And worst of all, the same people love to praise the mcu (which I have nothing against I love the mcu) and just like to 'not mention' questionable decisions like cap leaving Peggy. That Is WAY worse in my opinion than Iris saying "we are the flash" but somehow that doesn't ruin a film or character, but that does. And I get that 1. Endgame was a great film and you cvan look past that and 2. People didn't like a lot of things from season 4 (not me) and that was just part of it,
I mean hating the show for one piece of dialogue.
It's a bit rediculous.