I agree with your overall point, that said...
Scrub is a rather major exaggeration lol. Waka and Julius were top tiers in KAT, arguably KvP and even now I'd argue that Waka's showing against Omori indicates that he should be up there with the RCT four.
I'd also say that KAT handled it well. Kuroki had a lot of luck with his opponents, and Waka was stomping Ohma before getting Plotsbaned. Hell, I'd argue that liver kick should have won him the match.
I legit feel like Waka at least would have had some chance of beating Kuroki and Kanoh in KAT at least in theory, and Rolon did hype him and Julius to Kanoh's level in KvP.
But yes, in Omega Kuroki, Ohma, Shen etc really make even top superheavies seem like jobbers.....to say nothing of Gozo, Toa, Haruo etc who really aren't on that level.
Toa is I think a very good example of this. Busted skillset and physicals, gets bitched on in all his fights.
Another is Nitoku, body of Melos and he got...you know what, I don't want to talk about it.