Indesign is broken?

Version 15.1.3

Issues: 

Import options don't work correctly. I check import footnotes and endnotes but they don't 

Also I have it set up to keep formatting but it doesn't so italics and bolding is lost. Yes I have a GREP for it.

Keep options on one file didn't work correctly, some started on a new frame others did page breaks that were not set.

When I have to force quit it opens the file with the essentials and not my long docs workspace.

.idml didn't help

I've replaced my prefs, no help.

Can't upgrade with my current OS, so not a suggestion.

Would reinstalling the program work? It's a last resort since I have so much customization. A bit at wits end since every file seems to have a different issue and I have a lot of book projects ongoing.

TIA