Some stunts are too much work for too little pay off. I mean, If it's really tedious and a pain in the ass, ask yourself if it will be worth the effort once it's landed. Sometimes it can become an obsession to land a stunt even if it's not that spectacular. I gave up on a couple stunts once I realized the trouble wouldn't be worth it. If I'm going to stress over trying to land something, it has to be sick. And if it can be landed within a short period of time you have two things, either it was too easy and probably shouldn't be used, or you got the super rare, beginners luck.
Anyway, Take a break and come back fresh, we all need to do that every now and then.