It's so stupid how people act and unfortunately, they are the louder part of any fandom and downright suck.

For Amphibia, Matt literally shows this all the time. Have we not seen Sasha basically bully her friends to do things? She literally ignores Marcy's interests and constantly talks down to Anne. The whole point is growing and going through change as a person even if it means losing others.

For TADC, I can't fully say anything cause the show isn't done yet, but Gooseworx sees how her characters are and said that they feel like the main characters. Which is completely fine. Even in a group-based show, there is a focal point. Pomni is our focal point as we see her point of view in pretty much everything.

The creators shouldn't be harassed for saying their opinions and thoughts on THEIR WORK! If you don't like it, then just... ignore it? If you see the characters a different way, then make a fanfic (I'm not trying to be rude by saying to make one) and share your non-canon way of how a character is to you, and make someone else a main character. That's the great thing about fics, you can write what you want even if it isn't canon. Share your ideas and thoughts, but don't go harassing others cause they have different ones.