3bet a little bigger preflop, 10,10.5,11x. 9x is slightly too low.
Btw you want folds preflop, so when bb cold calls that's really bad for you (utg becomes pretty irelevant once he calls because your 3bet was small).
Once the BB donks the flop and i see he making it 75% or so in a 3-bet pot i already know that he will shove any river, there is no other option there soooo because of this just fold on the flop. You cant beat anything.. there is not a single hand i can think that you can beat on that situation. Unless he is really really bad and he cold calls KJ and play it like that but even If he calls preflop with KJ i don't belive he would just donk shove with that.