Or maybe, considering you have remarked you have had similar problems elsewhere, it is your time to learn how to cope with forums?
My own view is that you just need to learn to calm down. Being sensitive to others' comments is one thing and can be a good thing but you seem to take the slightest things personally and to heart. Forums, perhaps, are not the easiest of places as you don't get the feedback (eg. facial expressions, tone of voice, etc.) that you do in face to face conversation and misunderstandings can occur because of this.
If you could just sort of chill out a little, I'd doubt there's any reason why you can't be a valuable contributor who enjoys being here. As I sort of hinted before, it can be a good idea just to read at times. As well as sort of taking you out of the "firing line" (not that there's much firing here), it might help you learn a little about the other posters here and how they relate to one another.