I know exactly what you feel.
Especially the "can't talk to professionals". I wish no one was ever jailed for suicidal thoughts. I wish it was possible to be open and honest with professionals and other people. I can't trust professionals because of that. Sometimes I feel like I want to talk to a professional, but I just can't trust them.
I have found that on here I am free to talk about suicidal feelings, but even on here it can be hard.
Let's say, for example, there's a user with a terminal disease, and they'd rather ctb before they become unable to walk and talk. I have a lot of trouble knowing what to tell them. It would feel wrong and immoral to say "Yeah, you should ctb before your condition gets worse" and yet at the same time saying things like "Don't worry, it can get better, focus on positive things" feels like lying and positive toxicity.
I wish people accepted that sometimes the only good way for people is to ctb. If your life has been shitty for the first 30 years, it's not unrealistic to think it will be shitty for the rest of your life too. I mean it is possible, but not that possible.