In Calvinism, God purposely determines ahead of time who will be a lost sinner, and who will be a saved saint, apart from any consideration of what that person wants or wills in the matter. It says God pays back the sinner for being what He made them to be, but says the saint has no responsibility for being what He made them to be. That's a horrible inconsistency.
The inconsistency is in your mind because you wont accept what God has revealed about His Sovereignty in Salvation Rom 9, God has every right to make some men to be vessels of wrath and fit them for destruction, and then make some men to be vessels of mercy and prepare them for Glory Rom 9:13-24
13 As it is written, Jacob have I loved, but Esau have I hated.
14 What shall we say then? Is there unrighteousness with God? God forbid.
15 For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.
16 So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.
17 For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth.
18 Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
19 Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will?
20 Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus?
21 Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?
22 What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction:
23 And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,
24 Even us, whom he hath called, not of the Jews only, but also of the Gentiles?