You see, no one here suggested it was Ox sensors.
You spent money on parts trying the shotgun it. When it didn't work you get angry "at yourself".
You still have an intake leak at some point. Are the codes 171/174?
We are trying to steer you, so you have to keep looking to find what your missing on the air intake area.
Other places to inspect;
Dip stick tube and stick seal.
Throttle body bolts/gasket.
PVC.
Rubber fittings out if sight that may be rotted.
Intake hose from the air meter to the throttle body.
Fuel regulator hose.
EVR hose.
Plastic lines broken etc.
Good luck.