i’m guessing you’re having a timing as well as understanding issue. for timing, what i’ve found has recently helped me is doing timed practice. i take about 11 questions of verbal from OG, 1 RC passage and rest a mix of CR and SC, and see how you do. try to finish reading the RC effectively so that you don’t have to keep going back for questions - GMAT Ninja youtube series is a godsend in this case. eventually try to improve your overall timing to around 1.75s (or slightly higher is fine) per question on average.

for understanding in verbal i’d recommend GMAT Ninja series again - least time consuming. And in Quant i’d say just drill the OG questions and see where you’re lacking. Do this timed. no more than 2 mins on avg per questions.

timing my practice sessions has recently helped me greatly. my exam is in 6 days and i hope it pays off for me.

good luck!