Your original post says it all. It isn't that you have weak verbal skills, per se (although you should still brush up on the rules!) - it's that you're taking the test wrong. Check out this post on the MPrep blog for more detail. It discusses Quant, but the situation for Verbal is basically the same.
https://www.manhattanprep.com/gmat/blog/ ... mat-quant/From how you discuss your results, you seem to still have the mindset that getting a certain percentage of questions right is necessary, or at least important.
It's not! Almost everyone gets roughly the same percent of the questions correct, full stop. What actually matters is
which questions you get right and wrong, and
when during the test you get them right or wrong.
If I were you, I'd emphasize the following:
1. Make sure you don't have any 'holes in your foundation'. If you miss
easy questions, it ends up having a much greater negative impact on your score than missing
hard questions. Actually, missing hard questions is totally okay and won't affect you much. Start with MPrep Foundations of Verbal or a similar book, go back to basics, and make sure you're at 100% accuracy on the easy stuff.
2. Timing drills. Using the GMAT Prep software or something similar, do timed, randomized verbal sets with all three problem types mixed. Start with relatively short sets, but work your way upwards towards longer sets that will challenge your stamina and timing sense. As you do these, you'll learn to take the test more intelligently - making the difficult but necessary choices that every great test-taker makes, about where to invest your time and energy and where to walk away from a problem.