Sure, I am not a fan, but I don’t see any huge issue with this. Unfortunately, quite a lot of projects do stuff like this. If you are really concerned you can use matrix without using anything from matrix foundation (aside from the protocol) there are alternative clients like cinny. And even alternative servers like conduwuit.

I would say it varies. In most episodes sure, but from O’Brien’s “He was more than a hero; he was a union man.” to the previous episode of Lower Decks, where the crew helped people abolish capitalism, and it was celebrated like a party. So I would say that it is a bit more leftist than you give it credit for.