You have to spend a lot of time with Him getting to know the kind of God He is, perfect, very merciful, compassionate, loving, kind. Psalm 136 says His mercy endures forever 26 times. He knows we can't get rid of our sins on our own, so since you're wanting to get rid of them I don't think He is probably mad at you. You need to seek Him to do it for you, you can't do it yourself. He knows that. You just need to figure out how to do that. You ask and believe and trust Him to deliver you Himself, with His strength and power. Go to the Scriptures and be completely honest about your sins and confess them to Him the way they really are, in light of the Scriptures. Let Him cleanse you with His blood. Keep telling Him you want Him to deliver you completely, that you want to walk with Him the way He wants you to. You must trust Him to do the whole work for you (Romans 4:5), it also says the just shall live by faith. You trust Him to do it. Also, the sins you do are sometimes things you do because it's what you did to cope with bad experiences that you had in your life. You have to have God explain the whole thing, have you talk to Him about those experiences, heal you from unforgiveness and lies you believe, about anything, about yourself, other people, about Him. If you had a difficult father or mother you might have a warped view of the Father. So you need Him to heal you from that too.