Microsoft told you 15 years ago that IE was being retired.  PERIOD.  That is NOT microsoft's fault, but QB still using it even today packed under "their own custom browser" is complete BS.

You want to talk class action when I can guarantee 90% of the people here don't have cars as old as IE, let alone the better part of the decade that MS gave you to do it differently.  You literally don't have a leg to stand on.  

QB is garbage, their support is awful, and getting support is akin to the 7th circle of hell. As someone who has supported this vast garbage heap (seriously, why can't QB use more than 1 processor thread?) for over 2 decades, you're pointing the finger at the wrong subject of your disappointment.