does God clothe Himself with decay? no.
The cross would show that this conclusion is wrong. Gd created the world and saw that it was very good. So, one could say that the garment was originally not corrupt. It became corrupt and decaying. However, God did not immediately discard it, but condescended to keep on wearing it in order to rescue some mementos from it to keep forever. God did not resile from putting on our sin as a garment in Christ on the cross.
Zec. 3:1 And he shewed me Joshua the high priest standing before the angel of the Lord, and Satan standing at his right hand to resist him.
2 And the Lord said unto Satan, The Lord rebuke thee, O Satan; even the Lord that hath chosen Jerusalem rebuke thee: is not this a brand plucked out of the fire?
3 Now Joshua was clothed with filthy garments, and stood before the angel.
4 And he answered and spake unto those that stood before him, saying, Take away the filthy garments from him. And unto him he said, Behold, I have caused thine iniquity to pass from thee, and I will clothe thee with change of raiment.
5 And I said, Let them set a fair mitre upon his head. So they set a fair mitre upon his head, and clothed him with garments. And the angel of the Lord stood by.
6 And the angel of the Lord protested unto Joshua, saying,
7 Thus saith the Lord of hosts; If thou wilt walk in my ways, and if thou wilt keep my charge, then thou shalt also judge my house, and shalt also keep my courts, and I will give thee places to walk among these that stand by.
8 Hear no
So, I don't think your rebuttal here holds biblically.