As a breh who's fav has been Donatello since the 80s, I hate how recent TMNT movies/shows make him a super nerd with glasses, non-threatening and shyt. I prefer his intelligence to be a bit more subtle, personally. Once I heard his voice in Mutant Mayhem, I delayed watching it, but I'll get around to it one of these days.
I can see it being subtly stated but in that movie it's not stated at all lol. Raph and Leo have dynamic personalities, Mikey is Mikey and Donnie is also Mikey too but less wild.