I had 120BB

UTG +2 (60BB Active player) min raised
HJ (25BB) unknown player called ,
I was in SB with AdTd and squeezed to 8BB
Unknown player called , I flopped a 10 which was top pair and obviously got it in considering the SPR

He had AJ and hit a J on the river but my question is should I have just flatted in this spot? TBH I wasn't really paying much attention to the unk player and would have been in terrible shape if he jammed on me pre.

What would you guys do?

I think that's a respectable shove on the flop considering you had nut top pair. It sounds more like a bad beat to me. A lot of players will call in hopes of hitting an overpair on the turn and river even though the likelihood is low at around 10%.

I was in a similar situation with KJs and the flop comes 6,8,J and of course I jam since I was SB and was playing against someone in position with a much looser range. Turns out the guy had 10,9 and got a Q on the river, knocking me out on the bubble.

in a situation like this that I started on the tuner and nava. Increase before the river to 70% of the point and just as you would take the hand.