I would say consider it a practice league. If it's harder to focus, then that's a good thing for it can help you to make yourself concentrate more and focus better.
Also if your summer situation is anything like mine, if you get an actual "condition", it's a minor miracle. You can bring a wide variety of strike balls to practice adapting to them.
Work on what you need to make yourself better; everyone has room for improvement somewhere in his or her game.
Maybe next summer try to enter a sports league; there seem to be more of them in the summer than in the fall/winter season. (At least around here that seems to be the case.)
Good luck.