Had that 12 inch model and had a lot of blade deflection. Switched to full kerf blades and it helped some. Got rid of the saw and went with a 10 inch bosch instead. Currently keep a full kerf glue line blade on it. Baby behind smooth cuts. Also learned to pull the blade toward me to make a shallow first cut, then push it back for the full cutoff. This gives the sawdust a channel to fly out of so sawdust doesn't just go flying every which way. I have also used in the past an 80 tooth full kerf on the saw and got excellent results. The Glue line blade is really a rip blade at heart, but man, does it do a nice clean, smooth cut!
If you can manage it, a stiffener also helps keep the blade from deflecting. The problem showed up when trying to make angled cuts, eg: 45 degree miters for picture frames. Showed up on the 12 inch blade, no problem with the 10 inch. I tend to use Freud blades, the industrial models. Last forever and many sharpenings because the tips are thicker than the cheap models. Lots of good advice here.
The more I do, the less I accomplish.