I'd agree with the poorer quality, so it's not just you. I certainly don't think it's a big deal or anything but I would second this recommendation! I'd also second the shoutout to the superb explanations
Since your missing 15 on RC maybe try to focus on just three passages but try to get most of the questions right. and then guess the same letter on the last RC passage and you are likely to get one of them right.
OMG I second this book recommendation. It is such an incredibly story and I think will resonate with a lot of LSAT studiers (especially those that believe there is a "natural" cap of intelligence barring them from a 160/170/180)