Give time but be a little strict and stand up!
What you don't like, you have to tell him now. Let him take his time to change.
If he can't change accordingly, he will always stay as beast in your heart and never gonna transform into a prince.

In my opinion, I think you have found someone you loved very much.
Although you called him beast, you are still seeing all the beautiful thing inside him.

After all:
"Love isn't finding a PERFECT person. It's seeing an IMPERFECT person perfectly."