Right and that's why i'm saying he so far hasn't brought up in change. So he saw the corruption of the WG at Ohara (which is weird since he should already know about the giant slave network of the WG as a Vice-Admiral), he then took the promotion to be an admiral years after that... and did nothing to bring up any change. Instead became the most laziest marine top tier.. That's morally worst than Garp. Garp still kept his passion for putting criminals in their place and protecting civilians. He simply never attempted to change the system. Kuzan not only saw a similar incident, but with years of thinking and reflecting upon it... he took a position with authority to bring change... and did jackshit. Now to be clear i'm not holding that against Kuzan, since there's other marines like Smoker who've already said they wouldn't be doing shit Fujitora is doing even as an admiral.
If the change we're talking about is based on morality. Where we're saying Garp is morally fraud because even though he spends most his times fighting criminals and pirates who terrorize civilians, but refuses to take a stance against the CD. Kuzan is being brought up as somebody who doesn't bootlick the CD anymore... while also being the most lazy top tier in history of the marines, I would assume being correct would be a point no? Since we're talking about morality. Kuzan's morality of joining mass murderers to empower and help Teach get closer to his goal, due to w.e secret goal he might have, isn't any better than Garp training young marines with good morals and fighting criminals/pirates while not rebelling against the CD... Garp actively as a Marine is still doing overall more good than Kuzan as a BBP, just off the fact he's inspiring younger marines to fight criminals and protect civilians. Kuzan is inspiring criminals who harm civilians.
Like Fujitora, he's flat out better than Garp, which I've stated numerous times though in general. Even Akainu I think is more passionate and bringing upon change than Garp ever did. Saka and Fuji the two most passionate marines to exist, while ideologically on two different ends of justice. Opposites of Sengoku and Garp who accepted the system while doing the most good they could within it.
Dragon just a different breed. Though, I think not enough is stressed upon the fact Dragon and Garp still communicate with each other to this day. So it's not gonna be out of realm of possibilities we see Garp leading a group of marines whenever Dragon actually starts the frontal war with the CD. TBC, I'm not saying Garp is morally a great guy, I think he's just like your normal "good marine", nothing particularly special in the moral department.
MB for the long post.