Though I can’t say I’ve been able to raise my CR score by 120+ points, I did improve considerably on my CR section within the course of the summer months. The big turning point was when I figured out that the SAT is in fact a very ‘factual’ exam.
What I mean by this is that if it does not EXPLICITLY state the answer in the text, it’s not correct. To my best of my memory, there were very few questions (<2 per TEST if not 0) that required any inferences (there may have been more, but unless it specifically states to infer, DON’T). Do not overthink or use any knowledge not privy to the material before you.
Since you do seem to be acing the vocab section, it’s a matter of focusing and zoning into the passage for you. Also some tips and tricks like bracketing long passages with sections mentioned specifically in the questions helps. Read this guide (courtesy of Apoc314) through and see if any of the pointers help you during your practice runs.
If you have any questions, feel free to PM me. Good luck!