With Brad Stevens, you could see how his offense worked. I didn't like it but you could see the system.
With Udoka, it just looks all scatter shot. Guys running into the paint just as someone outside is starting to move for a drive bringing more defenders into the paint. Strange spacing. Inconsistent player locations for kick outs. Bad pick and roll sets with, again, off ball guys with strange cuts and positioning.
It looks awful and I can understand why so many of these guys are struggling on that end.