Looks like microsoft doesn't really care to fix this issue..... Maybe it's time to switch to Gmail instead because I absolutely don't have this issue with my Gmail account.
It's pretty ridiculous that I have to sort through my junk folder several times every day to ensure super important emails (school, legal, business, family, etc.) aren't missed, and that my inbox is constantly being blown up with junk!
After having my microsoft accounts (Hotmail and Outlook, for personal and business) for ~20yrs, switching would be a significant transition, but if microsoft refuses to actually do something to fix this apparent bug that so many people seem to still have, despite MS recommended "troubleshooting", then it seems like that would be the best and/or only option anyway.