Feif un:
First of all, you can be dan lkaf zechus the bikur cholim guy. Maybe he didn’t see you trying to pull into that spot until it was too late.
2.I think it’s a bit presumptious of you to decide that he probably forfeited his schar for the mitzvah or that he blew it. That is Hashem’s cheshbon, not yours. However, you instead can ask yousef where else besides for by the Yidden do we see the concept of Bikur cholim, and the massive chessed machine that satmar bikur cholim runs is nothing to sneeze at.
mi keamcha yisroel!