I've kinda solved it...

Even though sometimes I get an error while posting or commenting, sometimes the action goes through. So, after doing something, I check if there actually is a new post or comment, then I retry in case there isn't.

With the page loading...I just refresh the page. It's annoying, but it works for now.

i also was worried that i got banned lol

Apparently our instance is being scraped rn. Should be fine in a couple of days (I hope).