Red Garou's AP is at least comparable to that of Tank-Top Master's and Post-Superfight Genos'. In the Genos' Training audiobook, Genos beats Hydrated DSK with just 2 moves, that version of Genos was pre-G4. Post-Superfight Genos has the G4 upgrade plus a smaller extra buff, and his physical AP was stated to be equal to that of TTM. Even TTM would no-extremely low-diff DSK. Red Garou whose AP is, again, comparable (not necessarily "equal") to TTM's off of scaling literally hurt HIMSELF by punching Bug God. Bug God was totally unphased by the attack meanwhile Garou's fist was bleeding. Plus Bug God's carapace completely no-selled Royal Ripper's blades, with RR being portrayed as a fairly high Demon level threat, plus his blades were strong enough to nearly kill Red Garou who in a far weaker state tanked punches from TTM, Genos, and a somewhat restrained but pissed off Bang, AND his blade still managed to harm Garou the second time they fought, who was able to endure a blast from Rover at point blank range though he was close to dying ofc. Not saying Bug God would just eat a blast from Rover for breakfast but I don't think he would fare anywhere near as poorly as the 3 joke Monster's.
But it doesn't end there. Drive Knight when talking to Sekingar about dangerous Monster's he discovered and documented (mainly Cadre's such as Nyan), Bug God is included in images of them. And to top that off, Bug God still had a transformation he only used on Darkshine, but he got no-diffed so we don't know if it was a massive power amp, if it only effected specific stats, etc..
In the Garou fight it was shown that he was a bit slower and had clunky movements, and when he did land attacks they didn't do much damage. But in terms of durability he's like, easily top Demon level off of absolutely no-diffing attacks from two people whose AP is easily high Demon level. Plus keep in mind Garou could have already been around bottom tier Dragon level at this point. Bug God was just unfortunate to run into Darkshine.