When I first got the CAS, I absolutely despised it. I thought it was slow, clunky and needlessly complicated. I never made a document, and thought that entire system was pointless. After I had used it a while, I realised how powerful it was and how much easier it was to use than I thought. Initially, I think I was in the same feedback loop you are in right now. I didn't like the CAS, so I didn't "use the calculator much", so I didn't become good at using the CAS and then I didn't like the CAS and so on. Force yourself to use it, don't ever use the scientific one, otherwise you will never become better at it. That said, I still have never saved a document and still think they suck, I did everything in the scratchpad.
If you never use the CAS calc in a SAC or exam, don't expect to do very well. It is required for a reason, but it is probably easier to use than you think, after a bit of practice.
Ironically I started liking the CAS so much I started automating the work I was doing in CAS, for both Methods and Further. For Methods, I made a program which would find all important points on a graph, justify turning points, find asymptotes, visually show you what the graph would look like in the calculator page etc from just the function and domain. That one probably saved 10 minutes in my exam. For further, I made one to provide all transformations (x^2, y^2, log10(x), log10(y), 1/x, 1/y) to bivariate data to linearise it (making curvy lines straight) and sorted it by it's r^2 value. I also made one to show all working for finding the R value and the LSR line for bivariate data. These were so incredibly useful, I'm actually considering selling them.