People frequently advise to talk to a therapist or doctor because they have no way to know if you've posted more than one thread unless they know you.

I took a look at your list of threads so I am going to point out some observaions I made.

Out of the ones that are mental-health related (and within the past like month) you do get replies to your threads. A lot of the threads die off without having you as the last post - which means that you were the person who did not reply.

Some of your threads were more just rants where you didn't ask for much of anything.

I'm not really sure what else you are wanting from people. Threads that are huge and multiple pages long are often about a topic and not about a poster.

If you are wanting more of a feeling of friendship on the site I would suggest posting on other people's threads - people are typically more likely to engage in something if they know the other person, or know that the other person is quite supportive of others too.You don't even have to have suggestions for people - a lot of threads are just in need of some support. That doesn't mean to spam random threads, but it doesn't take too much effort to find a sentence to say to wish someone well.

Like... I'll use myself as an example. I'm the absolute most likely to read and post thoughtful replies on threads started by users who don't post very many threads but I recognize as being supportive and empathetic to others. If I see that they've posted a thread, I read it. Then there are others who I see commenting a lot but also actively make their own threads. Then I read threads which have titles that catch my eye - either because I think I can help/relate, or because it annoys me (that one I am not likely to respond to!). I almost certainly skip threads where I see that one person makes a whole bunch of threads about every new thought (to me, personally, well, personally it's a pet peeve!) and doesn't contribute much to the community otherwise.

I'm sorry if any of this sounds harsh, I'm just trying to give you some other perspectives.