First, I really appreciate the awareness to call it “stubbornness bite back”.
The good news: Everyone that transitions from any 3D app to another 3D app experiences this same pain. Literally everyone. Take heart that you’re in good company!
13 years ago I was a 3D software nomad, taking pride in jumping from max to maya to zbrush to mudbox then finally to Blender. Haven’t had to switch since.
The bad news: Omar is right about getting used to Blender’s default UI. Though we have full control to change hotkeys as we please, the domino-ramifications to those changes cannot be predicted fully. As you’re experiencing, anything not default will cause functionality issues at some point.
Thus the best advice is to embrace the temporary pain of hotkey/UI unfamiliarity for the long term benefit. Having used so many 3d apps myself (among a handful of video editors, photo-manipulation software, etc), trust me that the pain is very temporary and worth it; for all apps, not just blender.
