Sorry to hear it went badly on yours.
Could a Verizon store re-flash the update for you, I don't know. You have already been on to Samsung, so probably Verizon too.
I suppose you tried leaving off as many apps as you can, and disabling many Verizon apps.
Lollipop 5.1 is supposed to fix some issues, but that's only starting to roll out to Nexus devices first, so could be weeks or months.
Odd it went OK for many Verizon owners.
Voice control, proximity sensor, and Multi Window not working?
I don't know if it will correct itself in a few days. Has anyone received extra Verizon patches.
Your CSC number by dialing *#1234# should match N900VVZWEOB6 ref Sammobile.
http://www.sammobile.com/firmwares/database/SM-N900V/