I replaced my thermostat, my water pump, my ,and my engine still overheats.

it has plenty of coolant, what else might be the problem.. I really don't know, its got the right thermostat, and the dex tro coolant.

IF, IF it is FULL of coolant and radiator fan(s) are working, it is possible a head gasket may be defective! Repair shop can do a combustion leak test to confirm or refute.

also could be faulty water pump,Have seen a few cases where the impeller comes disconnected from the shaft..if compression is ok as pushrod stated need to confirm that the pump is circulating the coolant propperly