First, I think you might be happier with GMAT Prep, PowerPrep and Veritas CATs than with Kaplan. For all I know, the Kaplan tests are great though.
Now onto focus.
Do you realize that your method for remaining confident is to stay away from things that challenge your confidence?
For instance you said this.
I didn't even take a GMATPrep or last 40 SC questions in OG2015. I felt that I shouldn't harm my confidence.
So your way of staying confident is to treat your confidence like an eggshell.
Then what happens on the test? The test doesn't care about treating your confidence like an eggshell. The test almost seeks to destroy your confidence, and seems to be succeeding.
So my recommendation is that you change your basic strategy. You need to build confidence by getting accustomed to maintaining your confidence in situations that are challenging to your confidence. Your confidence needs to be built on a more solid foundation.
One thing you could do is do the hardest questions you can find and when you feel like giving up or guessing, stay cool and keep seeking the correct answer. Sure, yes, mix this up with easier questions if you feel like it in order to get a taste of easier success now and then.
Meanwhile, there are two practice CATs in GMAT Prep and two in the previous GMAC software, PowerPrep, which is available on the resources page of Beat The GMAT, and all of them look, and score, pretty much exactly like the real thing. Rather than shying away from them,
practice for the real thing by doing the realest tests.
Beyond that, realize that many of the logic related and analytical skills used in GMAT quant are applicable in GMAT verbal as well.
You can handle this stuff. You can handle anything. You are an infinitely capable being who can develop infinite skills and achieve amazing results. You have every reason to be cool and confident. Now make it so.