I stopped taking amphetamine stimulants for similar reasons and with a similar outcome.

I ended up getting a prescription for Provigil (modafinil), a non-amphetamine stimulant.

It’s not nearly as dopaminergic as amphetamine, decidedly non-euphoric, but more motivationally stimulating than caffeine.

I found that the dose response lends itself well to former addicts, where taking the recommended dosage (100mg for me) does not result in a “high” nor does taking 3-4x that dosage, and is quite unpleasant to do so.

As well as being long lived, a single dose lasting 10-12 hours, not a time release formulation mind you, reduces the moreish hunger of short duration stimulants.