I think it's still as valid a complaint as it ever was ... and was for Disney to demand a big discount on the selling price, and then to ultimately back out anyway.
Musk tweets a lot of stuff because clearly, he likes to joke around or attack things he's not happy with, and Twitter happens to be his platform of choice to voice those things? It's no different than what I see people do on Facebook or other social media sites all the time, really. It's at least a fair argument on his part to say that "despite his initial concerns that Twitter was over run with bots and fake users", he was convinced that wasn't a serious issue by the time he made the deal, and then realized it was worse than Twitter's people led him to believe.
Honestly, I don't care if he gets out of the Twitter deal or he doesn't. Whatever .... I think if he winds up stuck with it, he'll come up with some new ways to use it or to leverage it to benefit his other companies, so it won't be a total loss. Probably wasn't one of his smarter decisions to buy it in the first place, but may have partially been an attempt to call their bluff and turned into a commitment? None of it is that relevant to Starlink or Tesla or to the PowerWall whole house battery pack sales, or PV solar sales, or even his "Boring company", and certainly not to Space-X.