I felt like the turn was a pretty awful card and that AK was probably only worth 1 street unimproved. After villain checked back turn, I felt like the river became a value bet, with the idea of folding to a jam. Then the jam came and I did fold although it felt close. No reads on villain, only a few hands together. I think given the action, I probably didn't look like I had a flush, so I felt like villain can jam any A or flush (or arguably ATC) and it's hard for me to ever call. Sitting on the other side of the argument, though, is that I think the bulk of the player pool are snap calling with an A in that spot. Was my fold a bit nitty or disciplined? Should I have taken a different line?