problem since upgrade

[Android Question]

Since upgrading to Android 5.0, I haven't been able to access some apps. The start screen appears, then you get a black screen and it goes back to the home screen. Also, some games won't log on, and it's a little laggy.

 

[Chris Fuqua]

I'm trying to figure out how to deowngrade, they pushed the 5.0 update on my Nexus 5 and I HATE it.