Office 365 apps keep needing repair every 1-2 weeks

I have an almost identical problem, maybe even worse. When I click on Word or Outlook, the program takes forever, and I mean f-o-r-e-v-e-r to start, if in fact it ever does. When I do finally get it to open and am ready to start doing something, I frequently (>75% of the time) get a "not responding" message and wait a few more minutes for that to resolve, or often I'll just shut down the program and do a full online repair. Happens far too often, and never happened, as far as I can recall, prior to my using Office 365. Previously I had Excel, Word, Access etc all as "free standing" programs, going back decades.