Afterwards he did the usual "complain about the call" because he took a really strong line, IHO, and I can only beat a bluff. I didn't see him playing a FD that way, and AQ or something that would either be 3bet pre I think, or raised on the turn if he didn't think I had it. I'm not sure if AQ is shoving that river either. QQ+ gets 3bet pre. I guess I could have had a FD, but I honestly could not put him on a hand that played like this. Is he only doing this with 44 and 88? I didn't have a read that he superslowrolled to the river. Could he be doing this with 55-TT as well if he just doesn't believe me or something?
your assumptions are off but your approach to understanding is sound!