“Porn induced ED” is a very high-intent search. The idea is that the brain gets used to novelty, intensity, and a hand-plus-screen pattern, then real sex feels underwhelming or the erection is unreliable. That matches what a lot of people report. It is not a guaranteed diagnosis for every erection problem.
If you quit and things improve, you have useful data. If nothing changes after a stretch of clean time, or you have pain, sudden loss, or other symptoms, see a clinician. Do not sit on a forum reboot calendar while skipping medical care.