‘Broken’ packages? Never seen it. I can’t even understand what you may be describing.
I strongly suspect this is one of those “stop hitting yourself” moments, but with some explanation I’d like to temper that conclusion. I admit I’m playing the odds: if the package system is messed up, likely you did a “hold my beer” stunt.
Yes, but if it’s a broken package it’s usually something wrong in the packaging done by the distribution or the user did something they shouldn’t be doing. I have never seen a package break without me doing something to break it.
Again, that’s a packaging issue, as the maintainer did not rebuild yum/dnf for against the new python. Aside from rebuilding those packages manually, the user can’t fix that either.