How to not give at first sign of trouble?

Hi Mike. First time here. Taking F7 in March. And I've watched all the OT lectures, did the illustrations, and read study text, technical articles, and all standards related IAS plus articles. I felt great. Felt like I mastered the topics. And really, I think all of them are very easy. My favorite are Leases and financial instruments. Finished everything on January 29th. However, after that day, I tried to start practicing past papers. But whenever I would encounter a question that required additional time and thinking and multiple tries, I would get frustrated after some tries and then give up. Now it has changed into procrastination. My question is how do I get past that point? My main source of frustration is perfectionism. I want everything to be perfect at first try even though I know it's just the start. This has happened to me before and did a lot of sporadic study because of procrastination as a result of frustration, but somehow, I passed all exams until now but barely passed. I really need help as I'm sure I'm going to fail this exam if I don't start practicing now. Thanks btw