Ok. This is only my opinion based on my experiences in several congregations over the years. If you leave this church, you will probably find the next is pretty much the same. I understand what they are doing seems passive aggressive, but every religious community I have been a member of does this. I think the other members actually are trying not to hurt you.
For example, I met a guy at my church. We were best friends. I decided to end our friendship. He is an alcoholic who is endangering lives drinking huge quantities and then driving. I emailed our pastor. While I know that seems super passive aggressive, I actually wanted to prepare her that he or I might be leaning on her. I also wanted to decrease awkwardness in services and fellowship.
It's somewhat the nature of the situation that we try and avoid confrontations at church. Also if you are correct in your assessment of your reputation, they might be concerned about your response if they attempted to address you straight on.
As for telling the congregation about your PTSD, you might want to carefully think that through. If these people are causing you problems or issues, do you want to give them that access to your pain? This not an AA meeting they will talk about it. Word will go beyond the sanctuary.
Also if you open that door, they will walk through it. If you let it be know you have PTSD, you might be asked why? Yes, people are that insensitive, even church people. They might be confused thinking that is a soldier's illness. Your behaviors unrelated to PTSD might be be ascribed to the disorder. People are really uneducated about mental illness.
If you really want to lay it out there, You might want to talk to a clergy member (one you trust) first. They know the congregation better than anyone. They might advise you on how to proceed or if to proceed at all.
I do understand your feelings all too well. I had peer sexual abuse in middle and high school school and familial emotional and mental abuse at home. I know I come off to strangers as grumpy, disinterested, and snappy. I wear ear buds almost constantly listening to music most of everyday. In truth I am isolating and terrified of everyone. Basically my thought process is "don't hurt me." Social situations are my personal hell. I can't tell everyone about my past, and I don't want to. Since I can't change all their opinions of me, I have to change me. I have to work on getting better social skills and handling my PTSD. But that's me.