I'm not discrediting anyone; it's the manga itself that is discrediting Garp.
- The "countless death matches" is a wrong translation
- Koby was one of the two main forces that took out Wang Zhi; it's exactly analogous to the Rocky Port situation.
Koby teamed up with Blackbeard to defeat Wang Zhi; this doesn't mean as much as you're trying to make it out to be.
Complete nonsense.
Compare how Teach treated them. A newbie Gura Teach called Old Garp and Sengoku relics of a previous era and gleefully fought them head on.
A fully fledged Yonkou Teach ran away from Old Rayleigh by himself.
That's an immense gap in portrayal and it's delusional cope to pretend otherwise.