The only thing it managed to do is to sabotage attempts at mediation and proposed partial ceasefire. Seems like factions in Kiev are started to tear itself apart, or their government branches does not coordinate to this point, or Uncle Sam's hand is still squezing them hard enough to force such obvious blunder (or all three in combination).

They took Kursk

What are you talking about, they made it less than a third of the way to Kursk

Forbes seems to disagree with you there bud https://www.forbes.com/sites/davidaxe/2024/08/17/out-in-the-open-and-on-the-move-in-russias-kursk-oblast-ukrainian-forces-are-vulnerable-and-losing-lots-of-armored-vehicles/

Also, not sure what you mean by "took Kurks", if you mean took a few villages by the border where they're losing way more troops than they did in dug in and prepared positions they were defending, then yeah big success.

Also, not sure how you think this is a bargaining chip. Given that they can't even hold well prepared positions in Donbas right now, how long do you think they'll be able to run around in Kursk?

Nor has this stunt diverted any Russian attention from the main front. https://www.ft.com/content/daa1a6ad-9ada-42ba-bfb2-2c199118e904

The reality is that Russia has far more troops than Ukraine at this point because this is primarily an artillery war with 80% of the casualties being artillery fire and where Russia enjoys roughly a 10x1 advantage in artillery. As a result, Ukraine is losing troops at a far faster rate than Russia is, hence why we're seeing a general collapse of the AFU unfolding.

Finally, pretty sure that western reporting is the last thing Putin cares about. This whole thing has been a gift to Russia because it weakened Ukrainian defenses on the main front, and put best Ukrainian troops in a vulnerable position. All Ukraine managed to accomplish is to speed up their own defeat.

It seems like they took Kursk without losing much.

Pretty sure they lost at least 3 columns trying to take some towns there.

Now they have a bargaining chip for peace talks...

No they don't. For the territories they occupy to be a bargaining chip, the territories would need to be strategically important enough for their capture to threaten Russia's ability to fight this war (they aren't) and Ukraine would have to be able to guaranty that Russia can't get them back by fighting and is forced to negotiate to get them back (highly doubtful given that Ukraine can't even stop Russian advances in their own territory, only slow them down at best).

...and possibly diverted attention away from the main front.

Last I've heard Russia haven't even diverted troops from the main front line in Ukraine, so no, it didn't even achieve that. Which makes sense when you know that Russia has way more manpower and equipment than Ukraine right now, this isn't the stare of the war when Ukraine's army was motivated and received billion dollars arms shipments every week anymore.

Forcing the enemy army to split over more front lines only works if you have the resources to maintain more front lines better than your enemy can. Which is why it's Ukraine who are getting stretched thin by their own shenanigans here, not Russia, the Kursk invasion was objectively not a smart move.

The western reporting may also get under Putins skin.

That's cute, but war is won with steel and blood, not twitter ratios. "owning Putin" is at best going to be a very short moral boost that's only gonna last until the soldiers on the front line notice that they are still getting shredded en mass by Russian shells all the same as before.