> automatic cat feeder

> Had to take it to the vet

Perhaps your cat (which presumably has a gender) is living in an emotional desert.

Cats have different behaviours, but mine (born feral, now very domestic) greets me in the morning, yells for his breakfast, chomps down a few mouthfuls, hops on my lap for a quick fondle, then resumes his breakfast. Afterwards, more cuddles, some dashing about, then he snoozes in a fixed sequence of spots during the day, interrupting his sleeps to join me for lunch. He comes and yells at me around the time I should be knocking off work.

Try assuming there's more going on emotionally in your cat's head - you might both benefit from it!