Not the person you asked but:

ADHD is a debilitating neurological disorder, not a mild inconvenience.

Believe me, I wish that just drinking coffee and "trying harder" was a solution. I started medication because I spent two decades actively trying every other possible solution.

> what would you recommend if one is against the idea of medication in general for neurological issues that aren't deterental to ones life?

If your neurological issues aren't impacting your life negatively, they aren't neurological issues. I don't know what else to say to this. Of course you shouldn't treat non-disorders with medication.

> do you feel the difference between being medicated and (strong?) coffee?

These do not exist in the same universe. It's not remotely comparable.

> have you felt the effects weaken over time?

Only initially, after the first few days. It stabilizes pretty well after that.

> if you did drink coffee, have you noticed a difference between the medication effects weakening on the same scale as caffeine?

Again, not even in the same universe. Also, each medication has different effects in terms of how it wears off at the end of the day. For some it's a pretty sudden crash, for others it tapers, and some are mostly designed to keep you at a long term level above baseline (lower peaks, but higher valleys).

> is making life easier with medication worth the cost over just dealing with it by naturally by adapting to it over time (if even possible in your case)?

If I could have solved the biological issue "naturally" I would have. ADHD comes with really pernicious effects that makes adaptation very challenging.