Ever since the newest update, my HTC M8's performance has been falling behind. What should I do?

A

AC Question

Ever since the newest update, my HTC M8's performance has been falling behind

I have an HTC One m8. I recently updated to Android 5.0 lollipop and I have experienced performance issues. Some of my apps will no longer open for more than a few seconds or crash when I go to a certain page. There's one app I use (reddit) and now when I try to summon the keyboard (I use SwiftKey) the app crashes immediately. It also crashes when I go to certain subreddits. Also on some occasions of I open an imgur link my phone bricks and I have to wait about 5 minutes to reset it. I also use an app called slidejoy that puts ads on my home screen and I get small amounts of money. Now I cannot open it to log on without it crashing.

This has been happening on other apps as well, but there are my most used so it concerns me.