How do I roll back updates on my MBP?
Mac OS X does not have a feature like Windows System Restore Points. Doing this sort of thing on a Mac is considerably more involved and problematic.

That being said, there are other options and workarounds for troubleshooting your system's performance and how to fix it. I'll have to leave that for another post.

Have you been using Time Machine to make complete backups of your Mac to an external hard drive, every hour, every day?