PokerStars Hand #219347635653: Tournament #3025960556, €4.55+€0.45 EUR Hold'em No Limit - Level I (10/20) [AAMS ID: M4F3F115DDEAD6DV] - 2020/10/13 19:18:20 CET [2020/10/13 13:18:20 ET]
Table '3025960556 1' 3-max Seat #1 is the button
Seat 1: TurtleLothar (500 in chips)
Seat 2: robidaia (500 in chips)
Seat 3: pensodasolo (500 in chips)
robidaia: posts small blind 10
pensodasolo: posts big blind 20
*** HOLE CARDS ***
Dealt to pensodasolo [Qd Ad]
TurtleLothar: folds
robidaia: calls 10
pensodasolo: raises 40 to 60
robidaia: calls 40
*** FLOP *** [9s Qs 6c]
robidaia: checks
pensodasolo: bets 80
robidaia: calls 80
*** TURN *** [9s Qs 6c] [6s]
robidaia: checks
pensodasolo:?

Pot bet on flop seems better, then jam turn. It sets up a better turn SPR - also I think most of his range that continues vs 2/3 pot will continue vs full pot. As played, I would bet 2/3 pot on turn and snap jam. Ofc you will be drawing dead sometimes, but there's a lot of hands you can get value from still too and you need protection.

I actually did a 1/3 bet on turn, which is probably very bad

It's definitely not "very bad". Think about decisions in terms of expected value. 1/3 pot and 2/3 pot can both be +EV bets here, while 2/3 pot (imo) is more +EV.