So many just sort of give up on spirals. I was the same way and then I realized that the people I see using them enjoy doing ones that are really challenging so I decided to try them again. It did not take too long to get a handle on them. The secret for me was to run my saw at half or more speed, progress at a steady pace while cutting, really important to let the blade do the cutting, and I always cut using the outer part of the blade (on the line I am cutting and the center of the blade in the waste area) to be on the line I am cutting. Continue your cut without hesitation, again slow and easy being guided by both of my hands, the one pushing ever so gentle that is guiding the direction of the intended cut.
Hope this helps as it did not take much time to understand what I needed to do.
Dick
heppnerguy