i put in new plugs an coil an the misfire got worst

I had overheating issues for a while know. Replaced the thermostat and housing. Also replaced ignition coils. Bleed the system 3 times and every day I wake up to an empty reservoir.

When idling it’s jerky and when I’m driving constant speed it’s jerking. I got the codes read at auto zone and it says that the I need new 02 sensors but the mechanic says I need new coils and spark plugs ? But when codes were read at auto zone it didn’t say I needed those just o2 sensors any suggestions ?

Have changed coils three times, each time I change the coil, the engine become very hot and burn the coil, I recently changed the head gasket but still it over heat, I took off the ECU for repair, before then it was cylinder 1 that misfires but after the repairs it shifted to cylinder 4 now, it gives a very rough idle and popping exhaust sound, can smell fuel at the exhaust when engine starts cold... Kindly help me am very confused here.