I'm sure Microsoft isn't out to get you in any way. Every smartphone has the chance to malfunction. If your phone is still under warranty, bring it back in and ask for a replacement
My 550 stopped charging after the update too. It keeps dying, charging slightly while off, then auto booting and dying again. Pretty much stuffed. Might have to grab a battery from another phone at work and try rollback.
Please refer to the solution given in this thread and post any grievances in the same one. This way, it's easier to track the problems and provide possible solutions.