I promise, you are not the only person who becomes hesitant to do additional practice questions when you struggle. Keep reminding yourself that failure is a part of any process - some of us have steeper learning curves than others, but everyone is going to make mistakes. Everyone. Your goal, when you practice RC, isn't to get everyone question right. It's to hone techniques that will, in the long-run, improve this particular skill-set. Put another way, say you do a passage, miss some questions, but gain some valuable insight into how to breakdown future passages more effectively. That's a very successful study session. But if you do a passage, get every question right - but have to guess on a few - and don't come away with any strategic nuggets that can be applied on future passages, well, you might feel good, but this is a less successful study session. So don't be afraid to miss questions. You're going to. Measure success based on whether you're developing a deeper understanding of how to breakdown a passage, not based on the number of questions you answer correctly. Most importantly, make intensive reading a part of your daily routine. Over time, you'll not only improve your RC skills for the GMAT, but find that the intellectual challenge of digesting complex material is actually enjoyable.