Last week I went to play 1/2 in a brand new room to try it out and had a rough night since the beginning. I bought in for $100 and the table I sat down was playing like a 1/3 - 2/5ishh table. Players were opening for $15 - $20 bucks every hand and I couldn't get a table transfer because the room was so packed that they told me it would take a while.. Anyways I played a hand where I doubled up through an old Asian player that was playing pretty tight. Next hand right after that I woke up to AKo in late position and the button on my left had straddled for 4
SB folds BB calls, UTG (villain) makes it $15 folds around to me I decided to call. and the BTN & BB calls.

The flop comes; 8K9 rainbow
BB checks, UTG makes it $20 I raised to $50 immediately
folds around back to Villain and he ships it for $250ish
I tank for about a minute and make the go all in since he got me covered.
Turn brings a 7 and River was a 2.

Villain flips over K7o for 2 pair......

What do you think I did wrong playing this hand ??? Would you fold top pair with a good kicker on that board ?
I think I should've raised him pre flop but I knew he was going to end up calling since he already put in a raise and was the same player I doubled up through a hand ago...

Thanks,

-Henry