I use PGT blades all the time and have used them for many years. PGT "Precision Ground Tooth" are Olson blades. They cut straight and they last a long time, however, they are aggresive. The key is to not push to either side of the blade. As others have said, let the blade do the work. I find if I slow the saw down and push slowley and keep the blade 90 degress to the table you will not have a problem. Yes, it takes longer. However, I don't do this to mke money. I do it for fun. Perfect circles are not easy to make.This takes practice. Sometimes a lot of practice.
Here's a link to the Olson web site. You can get all the information and what the various designations about the blades there.
https://www.olsonsaw.net/shop/scroll-saw-blades/plain-end-scroll-saw-blades-5-in-6-in/skip-reverse-tooth-pgt-precision-ground-tooth-5-in/
Good luck.