Yeah ,as current things are getting portrayed.
I think Garp could have done significant damage to Akainu back in Marineford .
I don‘t dare to say who of those 2 would have won back then tbh
I wouldn‘t say killed ,but significant damage to Akainu would be possible imo.
It‘s an intresting topic to discuss ,cause not long back people thought Garp was to "old" to compete with newer generations as some stated on this forum.