My G3 phone just updated to Lollipop I think and I hate it, how can I get it back to how it was before?

[AC Question]

My g3 phone just updated to lollipop I think and I hate it.

It changed all my fonts in all apps, it changed icons to a lot of stuff, I do not like the new notification screen at all. Everything is all messed up how can I get it back to the way it was before? My wallpaper does not scroll even though it is set to. Everything about this update sucks I hate it.