You have no right to call God cruel. He gave you the answer in His word. Read it.
Romans 9
21Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?
22What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction:
23And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,
I'm not. Just the opposite. I'm saying I can not see him otherwise in your theology.