I will continue to talk about it, because no other organization has EVER completely failed at everything they do. Baroque Works incited a fuc*king war and did everything to perfection. Even with PIS, the Straw hats were always on backdoor. You are just giving ONE example.
Marines did what they set out to do. Kill Ace.
Cypher Poll wasn't involved with Buster call, Marines were and they destroyed the whole place. But yes, PIS did hurt them at the end.
But BMPs keep ending up on the losing side over and over again. This is the definition of a failing crew. Zero success rate. Just enforcement of raw power.
And in the end BW drill failed because the war was stopped, that Crocodile didn't get his Ancient Weapon and kingdom and nearly all the whole organisation was defeated and arrested.
The CP9 failed at getting Pluton location and schematics and got Enies Lobby devastated and they were seemed criminals for a time.
Killing Ace was the only thing the marines truly succeeded at in the war, they failed to kill or capture the WBP and their allies, they didn't get to kill WB and Teach did it and his sucess at MF was much more symbolic than the marines. Plus more than killing Ace what they wanted was to show their power and send a message to the pirates in the world which failed too.
And if you pretend that the BMP are always on the losing end and a failure crew then you forgot that they are a very powerful crew that has been active for decades and that they have crushed countless foes outside of the Straw Hats and their allies and that most of their crew and territory is still intact.