Am I the asshole?

A little backstory. I’m 28 and just found my dad a year and a half ago by using Ancestry. Maybe 4 or 5 months after I found him he came to visit(he lives out of state). The whole time he was here his girlfriend kept calling and threatening to leave him. His brother kept calling and was saying he stole money from him. The visit just didn’t go how I’d imagined. After he went back home we continued talking on the phone. We went from talking everyday to once a week. I had tried to reschedule one of our phone calls because I was busy and his girlfriend blocks me on Facebook for it and uses his account to make a post about it. Weeks later she tries to add me back and I decline because I just think it’s childish to block someone for that. People have lives. I have a husband and children to care for and don’t think rescheduling a phone call is that serious. And let me mention any time I have to reschedule a phone call stuff starts getting posted on Facebook from his account. I’m not sure if it’s her or him at this point. Fast forward it’s been a few months. I’m still talking to him once a week but now he’s having to take the phone calls outside the house and he starts lying. And the stuff that he’s lying about there’s no reason for it. He would say something one day and our next conversation he’ll forget he said that and completely tell me a different story. He’s lying about money which I don’t want any of his money and I’ve told him that. I think he’s trying to impress me or something. I genuinely wouldn’t care if he was broke. Anyways fast forward to recently and he told me he was coming down for my son’s birthday party. A couple weeks before he calls me and says he’s not going to be able to make it because his brother has 6 months to live. This wouldn’t be an issue if I knew he was telling the truth. I’m friends with his sister and brother on Facebook and both of them have said he was fine so why lie? If you can’t afford to come down it’s fine, just say that. Now last week I was busy and the days I wasn’t I was too down to talk as it was the 5th anniversary of my daughter’s death. I apologized for not being able to talk and told him we could talk this week. Well Saturday was my son’s birthday party and after the party we had a tornado come through and had a tree fall onto our house. I sent him pictures and a video of said tree on our house and told him next week probably wouldn’t be able to talk either as we’ll be dealing with that. I’ve spent the week so far trying to clean the area that was damaged so that the insurance adjuster would be able to come look. I finished yesterday and told him I could talk tomorrow and then we got a call today that they’ll be out tomorrow. So I messaged him back and said sorry again and that it’ll be Thursday before I’d be able to talk. But now it’s gotten to the point where I’m just done and don’t want to talk to him anymore. He continues to post stuff on Facebook about me not being able to talk and I just can’t handle that any more. I had a drama free life before finding him and with him in it, it never stops. Added some of the things he’s shared below and every time something like this gets posted, it’s immediately after I tell him I can’t talk or try to reschedule. Am I the asshole?