Lagtard on my left and I'm lost

[SeaEagle]

Last night I played about 100 hands on a PP5/10 table with a 96/60/1.8 maniac - on my immediate left. And the 60 PFR is a little understated since he was forced to call capped flops. Amongst other hands, he 3-bet 43o and capped 63o.

When he first sat down, I was OK. I had a couple of middling hands (KTs, etc) that I open raised, he 3-bet and I was HU against him. But after a couple of rounds, the rest of the table caught on and started 3-betting/capping with normal raising hands, and I wasn't able to isolate him anymore.

At this point I was completely lost. I kept finding myself playing ATs or 88 for 3 or 4 bets and having no idea where I was during the hand. I almost just got up and left the table, but I couldn't force myself with all these 15-20BB hands going on. How do people adjust to a situation like this?