The biggest problem with the Sukuna fight post Gojo is how little of it has been interesting.
Introducing tidbits of information here and there to fill in the various backgrounds of the various characters just isn't going to cut it at this stage of the series. At this stage, people want resolution that they're simply not getting.
I'm not bored by the manga, but I'm getting there, which is bad. Frustration isn't great, but that at least reflects investment. Boredom isn't where I want to be with the manga, and yet we're almost there.
I think the root of it all is Gege trying to stuff 400-500 chapters worth of story into half as many chapters.