Me vs. Matt Flynn

[Wayfare]

6 Handed, I start the hand with 80x BB, Flynn has me covered. Stakes are low, players were trying to play right (at least the two in this hand)

I am dealt JJ UTG and make it 4x the BB. I get two callers behind me, one of them Mr. Flynn.

Flop 8h 6s 3h (~13x BB)

What's the best line? Do I back this with my stack?

In the event, I checked, matt bet 6x bb, I checkraise to 16x BB. I actually think this is one of the worst lines to take.

Turn 6d

I check, Matt goes all-in, I fold.

Rip it apart fellas.