i'm not totally a Transformers fn, but i think the comparison of that to Jaws is unjust, or maybe people doing it maliciously for cheap pops?
Transformers is, unashamedly, a popcorn, brain-in-neutral, smack-your-eyes-out summer blockbuster. it's not supposed to be anything but 120mins of adrenaline entertainment. Jaws is an entirely different animal. it's a tension movie. Deep Blue Sea would perhaps be more of a shark/robot comparison, if you wanted to throw Transformers into the mix.
if you wanted a good horror film w/ a good build and some jolts, you'd go for Jaws. if you were back from the pub w/ some mates and wanted kick-ar$e daftness, your go to Transformers. each is equally valid in its genre and trying to compare them is unfiar, i'd say.