I practice tithing. I see no problem with it.... unless.
You quoted Malachi to show that a curse comes on people when they do not tithe.
That was true before the cross.
Not now.
Galatians 3:10-13 KJV For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that continueth not in all things which are written in the book of the law to do them. (11) But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith. (12) And the law is not of faith: but, The man that doeth them shall live in them. (13) Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree:
Any curse under Law was taken by Jesus. So, to get away from a curse, paying tithes won't do it, but coming into the New Covenant will.
So if you still say tithing removes a curse since the cross, then you have just replaced the work of the cross with paying tithes.