He just cares about money
That's all he's in the business for, each one of his movies makes hundreds of millions and yet are all complete drivel. Oh, and I don't want to hear bullcrap like "he just wants to make entertainment" because we all know that's not true.
Especially since it's perfectly possible for a movie to be entertaining and not crap to the core. Several examples: James Cameron did it with the Terminator movies and Avatar, Spielberg did it with the Indiana Jones saga, Jon Favreau and Joss Whedon did it with Marvel, Christopher Nolan did it with Batman, Peter Berg did it with Battleship, Zack Snyder did it with 300, Watchmen, Suckerpunch, Man of steel, BvS and Suicide Squad, Justin Lin and James Wan did it with Fast & Furious, Paul Anderson did it with Resident Evil, and Guillermo Del Torro did it with Pacific Rim. What all these movies have in common is that they're legitimately good unlike Bays films, have coherent and intelligent plots (again, unlike Bays), likable and enjoyable characters we can all relate to (where's characters in Bays movies are just stereotypes), coherent and competent action sequences which are easy to follow and are convincing (once again, Bay can't do that), and the special effects take a back seat to the plot and aren't overdone CGI and explosion messes unlike in Bays films. Most importantly: The other movies don't resort to being sexist and racist consistently throughout the running time, both genders and all ethnicities are dignified, unlike in Bays movies which do the opposite!
Rant over...