Twenty blind stacks are really awkward. You're not in push/fold mode yet, but you don't have enough chips to make speculative plays either. So it's reasonable to muck low equity hands like 8-high preflop.

Villain did call a raise preflop, tho a min-raise. So he could have an A but alot of times he doesn't of course. So it's kinduva tricky spot postflop. That it's a bad spot postflop, even when you hit, further shows that folding pre would have been best.

As played, you could b/f the flop or b/shove, depending on your read of villain. Probably I would call down small bets and fold to a big bet. Checking the flop is fine.

OT, when I started playing poker, I had this tournament hand where me and the other guy min-raised each other about 15 times or so until we were all-in. Then everybody at the table berated us for several orbits. It was pretty funny. If you're gonna keep min-raising someone, have the nuts, otherwise it serves no purpose.