Yeah the too many cooks in the kitchen thing fits wellIf the teams youre a good fit on have to have LeBron or Durant (2 best players of the last 10 years probably, atleast 2 of the top 4-5) then you ain't really fitting in well in too many spots.
The only thing I'd say in his favor is that after the 2018 season, you had a lot of guys emerge in the playoffs for the Celts and when Irving/Hayward got back, they didn't want to take a step back and you just had too many cooks in the kitchen. Hayward also was playing way too much that year based on his pedigree/contract when Brown/Tatum were clearly better. Morris better roleplayer. But even then, he had a team full of guys that could shoot and play D, basically his ideal fit on paper.
But for the most part he's gonna have to really have the right teammates to excel given he only really does 1 thing at a high level.
I don't think the best fit means he has to have LeBron or Durant necessarily. More that the team has to be OK with more iso-heavy offense. Boston isn't that; it just was never gonna be a good fit.
Worked in Cleveland for a while because LeBron basically was a formidable offense by himself, plus allowed for a lot of their offense to run through Kyrie in iso when LeBron was resting/wasn''t feeling engaged scoring-wise
Now, any iso, Kyrie-friendly offense is much easier to achieve with another top tier player LOL but you could probably still make it work with someone who is slightly worse than Kyrie (Paul George-type maybe?)