I would say if you really have trouble even with the easy verbal questions, then it's not worth it to do loads of practices tests. Personal anecdotal: my verbal fluctuated between 8-11 three years ago when i was once trying to study for the MCAT, then after a second degree at Columbia during which I had to take large amount of core liberal art class, somehow my verbal became a forever 11 (or 85% correct) and even alcohol consumption didn't really change that. I'm an ESL student, so I think the studying at columbia pushed my reading ability up to a fundamentally different level.
I would also suggest that best to do right now is to stop doing extensive practice tests, especially stop doing none AAMC stuff. Just revisit your AAMC verbal diagnose question set and find a passage that you actually did but the results were poor. Go find a friend from English major and together you two read it line by line. Stop and discuss what you get from each sentence, you can start to see what you keep missing or what you keep misinterpreting. Reflecting on why you made mistake and trying to envision how to avoid the mistakes are way way wayyyyyyyy (I recently like to copy Dr. Cox's--from the show scrubs--voice in my mind) more important than kept making the same mistakes on new materials without knowing what you did wrong.
Then do the same for the question stem. In MCAT the question stems are like a gold mine, you must read it extra extra extra carefully. Anyway, another personal anecdotal: I did this reading with a friend thing, except that I read a few passage closely with a tutor I found off Craigslist. Only done that several times a week before MCAT and my last verbal practice finally escaped the pull of 11 and reached 14. I don't know what I got on real MCAT, but the exam definitely felt much easier.