I don’t think there’s any discussion that a prime Garp would fold Kuzan in a punching context, considering he was hanging out with the pirate king using his fists.
Yet, Garp is this state of the series has enough punching power to smash a YC1/YC1+ to the ground with a single punch which a feat only clear top tiers can perform. The fact Kuzan whose fighting style relies on his logia is even the one standing in a fist to fist to the face against this guy is a great feat