the best advice i got about rc is slowing down significantly while reading the passage. dont move onto the next sentence until you fully understand the sentence you just read, and try to read for structure, tone, and think about how the paragraphs connect to each other, even pausing after every paragraph and thinking about it a bit. when you spend a long time slowly reading through the passage and truly understanding it, you can go through the questions way faster without having to refer back to the passage. always try to predict answers, especially for main point questions. it's really worth it to take your time with the passage- remember all the answers are in there. it helps me to pretend to be really interested in the passage content as well.

what i'm getting from this is that you probably have the main ideas down but the hardest questions are getting you. answering hard (like level 4-5) LR questions is totally different than the other ones, they often have specific traps and require different thinking. you should try to drill the hardest questions and focus on the ones you typically get wrong, once you master the hardest LSAT questions the rest of them feel like a joke. the book LR perfection helped me w/ this (not an ad lol) but I think focusing on the hardest questions and the difference in strategy for them will help you most

what helped me is not moving on to the next sentence until you've fully understood the sentence you just read, as in you can rephrase it and even try to picture whats happening in the passage. force yourself to slow down on your reading and then you can do the questions way faster without having to refer back to the passage. also try to be interested in what you're reading even when it's boring and read for structure, as in finding the main point of every paragraph. predicting answers as much as possible helps a lot too