I actually thought the Boss Baby was a decent movie.
It had its funny moments, and as an older brother (especially one of a younger brother with special needs; I didn't know what autism was as a kid), I could relate to Tim's frustrations, having once been in his shoes during my own childhood.
That, and having grown up to hearing Alec Baldwin's voice in seasons 5/6 of Thomas and Friends and Thomas and the Magic Railroad, along with the fact that he's one of my favorite comedians/actors, it was really cool hearing him get to voice the boss baby.
My only complaint was the old gag of not showing their faces in the end. It's just very dated now.