Something I've learned with time (and also becoming the black sheep of internet communities) is that sensitive topics can tease out a person's underlying fears, remind them of unpleasant things they don't wish to confront, or leave them confused as to what to say. A lot of people too have been told that their job when someone expresses such deep sadness is to pawn the other party off to a professional, rather than sitting with that discomfort and learning how to deal with such situations themselves and act as a supportive listening ear when they arise.
I realized many people online use chatrooms as casual spaces, and serious conversations disrupt the "flow" of low-stakes interactions. Paradoxically, this seems to happen even in spaces dedicated to mental health support, where you would think the atmosphere would be more open towards cathartic emotional discussion. I don't really understand the purpose of such groups if one can't be truly vulnerable and express themselves.
I am sorry this happened to you, unfortunately a lot of platforms and their users have really pushed for the promotions of hotlines over the past few years, and created these canned copy pasted responses to every scenario, thinking it's the solution to suicidal people's woes. Outside of this forum, there is no one that I can really talk to who understands, so I know how bad it must feel for you as well to just want a friend you can open up to, only to be met with cold indifference.
I can really relate to feeling censored elsewhere and as if you can't be yourself around others in these groups, because you are struggling. While I don't open up about being suicidal to anyone now, and haven't for a long time, even describing things that have happened to me which were negative has caused me to be received badly on multiple occasions.
One time, I just vaguely explained that I have been judged for wanting to have hobbies and interests or liking cute things as an adult, and got called a nihilistic doomer over that, had multiple people dogpiling on me for that comment and saying how much they hate doomer mentality, when all I was doing was pointing out an (albeit negative) observation that people can judge you for small, harmless things and that it's bad? I give up on other online communities at this point cause it is just ridiculous.
The waiting period/post requirement to access chat feature didn't seem to exist when I first joined, if you keep posting eventually you should get your access to the chat back and can hang out with people there again. It shouldn't take too long, I think.
