Car started overheating, I have replaced the thermostat, temp sensor, fan relays, hoses, water pump, and radiator what else could be wrong?

Thermostat very rarely will ever cause it to overheat, if you don't know what your doing or how to bleed the coolant system, you can cause an air pocket to form inside the coolant passage which will cause an additional overheating issue & you may have fixed the original overheating issue but caused another one in the process. Have you checked the cooling fan operation? Air flow across the radiator?

The radiator internally? Head Gaskets been checked using the special tool & solution you can buy from any auto parts store?

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