A5o blind attack

A5 BvB is not an okay hand. its an excellent hand.

and yeah you really shouldn't be 3barreling everytime. I cant judge whether i like to 3 barrel this board or not personally i wouldn't. I think.. whether you have to 3barrel or not to me is about the board and opponent . and believe me I can tell you that your opponent is making a lot of mistakes everyone of us does down here in the micros. thats why we arent high stakes players

Hmm so it is called 3barreling.
At least I learned that.
Going on, on the turn would be 2 barreling then?
c-bet = 1 barrel...

Raising Preflop is standard but i would actually not even bet the turn again since 9 is a bad card for you. All the Gutshots he could have peeled like Q9 J9 and QJ has arrived now. You could be still ahead against a flushdraw that he probably did have as he did fold by the River. Once you did bet the Turn again you should at least check the River and i would check/call the first time. Gutshots Jx Qx are busted and a King he'd probably raised the Turn with. Many players are too weak to valuebet 9x and then his range becomes really narrow if he's just betting A9 Q9 and Tx. Enough flushdrawcombos he could be bluffing with. But there is no pair folding now on the RIver so your bet is pointless. I would check/fold on the Turn but let me figure out your EQ, assumed he is betting all his pairs and straights and yet unimproved flushdraws. Your EQ is certainly way too poor to continue.

Board: K♠T♠3♣ 9♣
       Equity     Win     Tie
MP2    13.78%  13.78%   0.00% { Ac5d }
MP3    86.22%  86.22%   0.00% { 88, 55-44, K8s-K2s, Q9s+, J9s+, T2s+, Qs8s, Js8s, 9s8s, Qs7s, Js7s, 9s7s, 8s7s, Qs6s, Js6s, 9s6s, 8s6s, 7s6s, Qs5s, Js5s, 9s5s, 8s5s, 7s5s, 6s5s, Qs4s, Js4s, 9s4s, 8s4s, 7s4s, 6s4s, 5s4s, Qs3s, Js3s, 9s3s, 8s3s, 7s3s, 6s3s, 5s3s, 4s3s, Qs2s, Js2s, 9s2s, 8s2s, 7s2s, 6s2s, 5s2s, 4s2s, 3s2s, KTo-K2o, Q8o+, J9o+, T4o+ }

As you see here. Your Equity just sucks. Even though he's betting with a lot of flushdraws. The fact that your just have 2 Outs against all his Pairs makes your EQ as low as it it. C/F Turn.