I have no idea of the context: I just watched this episode and I found it shocking enough to not bother trying more episodes.
> It would be fascinating if today's viewers might see it as an endorsement of those behaviours!
When watching, I didn't have enough context to say if it was an endorsement or not, but the body shaming and gay shaming were synchronized with a laugh track, so it's not just that it was considered to be ok for main characters to engage in such behaviors, it was intended as humor
I don't find that funny, but shocking and sad.
Whether you can enjoy 90's (or earlier) content really depends if you can view it in the context that produced it; if you go all "death of the author" it's just going to seem cringe.
I don't wish death to anyone. I try to separate the author from the art, so there are many things I can enjoy: I'm listening to Bing Crosby's White Christmas. He may have been a bad person [1], but the song is nice. If he was singing hate stuff on a happy melody, I wouldn't enjoy it.
This TV series making fun of bad things is something else.
[1] https://www.vice.com/en/article/mbqqeb/isnt-it-funny-that-bi...