Compared to others yes. He has bounced around quite a bit (ala Pep) only sticking around for 2 or 3 years before moving on. His coaching tree influence is mediocre at best (2 Coaches, both fired).
Inherited a a top Defense. Compared to Kafka who has spent 7 years under the tutelage of future HOF WCO/ZBS HC Andy Reid who is still coaching. Kafka has turned NYG Offense into a playoff team from a perennial loser. Daniel Jones has made dramatic improvements under Kafka.
This Colts fan does a good job of explaining why you want Kafka as your HC (start at 4:24):