Luffy attempted to assasinate a Yonko and got a 1 billion berry increase. So your point about attacking other pirates not raising a pirate’s bounty rings kinda hollow
Learn to read English. I said directly targeting Government as Dragon's Revolutionaries or Cross Guild Marine Hunters like Buggy and Mihawk is not comparable to just stealing prisoners or DFs from Government like Teach and Shanks does, the latter is not comparable level of targeting Government like putting bounties on Marines to make even civilians hunting Marines. Naturally, Dragon and Buggy/Mihawk should get bigger bounty than other Emperors except 3 billion Luffy, but Mihawk/Buggy still didn't get that bigger bounty than Teach and Shanks's bounties, because Mihawk/Buggy is weaker than other Emperors except maybe current 3 billion Luffy.
I never said attacking and defeating other pirates is not increasing his bounty. I said those are things that Government likes to happening, confirmed by Guernica:
Still they will get a bounty boost due to showing strength and increasing their level in pirate world, stll Government likes pirates defeating other pirates as we see from CP0 Guernica's reaction to Wano battle.
In the end, you ZKKfans know very well, Mihawk/Buggy bounty is mostly boosted due to Marine Hunting similar to Dragon's Revolutionary, however that huge extra bounty boost still not enough to compete with Teach and Shanks's bounty, who are not extremist Marine Hunters.