What happens if you make your credit card payment first and then large withdrawal from bank but the withdraw goes first and puts you in neg?

Can't go negative. If the credit card payment locks the funds, it goes through and impossible to withdraw the money. If the credit card payment did not lock the funds, and you pull the money, the credit card payment reverses and adds many fees higher than the balance before the payment.

You can get a returned check fee, missed payment fee, late missed payment fee, extra interest including a raise to the defaulted account rate.

You must fix it, or next your credit score dives also.

So then what happens?

Credit cards have a nasty habit of taking the payment from you, they confirm they have it but they will not immediately credit it to your account so things like that happen and then they can charge you. It is deliberate because that is how they make money.

Huge fees and your interest rate goes to 65%.