Am I justified in my frustration?

After you got the refund, with the implications that this case was now closed, you went on here to get your pound of flesh
I never came on here to out this guy and drag his name through the mud. Right before he posted I had just finished typing that I wasn’t going to tell oldkimmer who it was because it could likely be that this is just one bad deal and a bad judgement of the parts condition on his part. Then he joined the chat. I wasn’t coming for a pound of flesh. Until he joined the chat it was an anonymous member.
I started this thread when he was saying in emails that he wasn’t going to work with me on this at all. I got frustrated at that too so that’s when I started this thread.

It wasn’t till later in the day that he did offer to give me the $100 back on the $350 pile of rust and rat ****. In several emails previous to this threads creation he said he wasn’t going to work with me at all. I assumed he had seen or been told about this thread and gave the $100 as hush money.

I believe if I had not started this thread he would still be saying he wouldn’t help out. And remember, I never told him he was obligated to help out. I believed it would be the right thing to do given the misinformation but never said he owed me this or that.