I'll echo what Rich said and say that the computer adaptive nature of the GMAT pretty much ensures that EVERYONE is struggling within 4 to 8 questions of a section. In other words, pretty much every question you'll see on test day will very difficult....for you. So, when you say that you tackle questions that medium to hard, you need to recognize that you won't see many questions that you feel are of medium difficulty.
You should also keep in mind that the GMAT is a test of your math and verbal skills
AND it's a test of your test-taking skills (endurance, time management, anxiety managemement), so, it may be the case that you need the most work on your test-taking skills.
To identify where you need the most work, take FULL-LENGTH practice tests and carefully analyze them afterwards.
During this analysis, there are four main types of weakness to watch out for:
1. specific Quant skills/concepts (e.g., algebra, standard deviation, etc.)
2. specific Verbal skills/concepts (e.g., verb tenses, assumption CR questions, etc.)
3. test-taking skills (time management, endurance, anxiety etc.)
4. silly mistakes
For the first two weaknesses, the fix is pretty straightforward. Learn the concept/skill and find some practice questions to strengthen that weakness. To focus on one topic at a time, you can use BTG's tagging feature to isolate one concept. For example, here are all of the questions tagged as statistics questions:
https://www.beatthegmat.com/forums/tags/ ... statistics
See the left side of that linked page for more tag options.
If your test-taking skills are holding you back, then you need to work on these. For example, we have a free GMAT time management video at
https://www.gmatprepnow.com/module/gener ... es?id=1244.
Finally, if silly mistakes are hurting your score, then it's important that you identify and categorize these mistakes so that, during tests, you can easily spot situations in which you're prone to making errors. I write about this and other strategies in the following article for BTG:
https://www.beatthegmat.com/mba/2012/09/ ... n-the-gmat
Cheers,
Brent
