>>9176589A majority of modern paleoartists and other involved people extrapolate too much from the behavior and appearance of modern birds, and try to apply it to all extinct archosaurs. Even before the K/T extinction, birds were an extremely aberrant and extremely atypical branch of the archosaur family tree. There was nothing else quite like a bird, and it's foolish to portray a Stegosaurus or Brachiosaurus with bird-like behavior, mannerisms, and especially soft tissue.
Imagine if you will, 70 million years from today, there are only two surviving groups of mammals, those being baleen whales and the platypus. Can you really take the lifestyle and niche of a baleen whale, and use that knowledge to extrapolate much about the ecology of a tiger? A camel? A porcupine? This is where we are today with archosaurs. We have a fairly primitive and conservative member of the group, crocodilians, which serve as a good but far from great stand-in for the ancestral state of the clade, like the platypus is for mammals. And we have birds, which are really fucking weird but diverse group unlike any of their relatives bar, like the baleen whales. Hell, in this though experiment you don't have a single living representative for marsupials, nothing even close, and this is where we are with pterosaurs. You will never truly know much about mammalia as a whole if this is the extent of your sample size, and that's the way it is with dinosaurs.
To answer you actual question, they ought to be portrayed as they were in the first Jurassic Park film. Unironically. That's a major part of what made that film so special, the dinosaurs were living creatures, and not just a fantasy monster with a Latin or Greek name. They travelled in herds. They got tummy aches. And, under a set of very particular circumstances, they ate people. This is where JP3 and to an extent JW dropped the ball. And FK didn't just drop the ball, it ran into the wrong end zone and proceeded to do a Fortnite dance.
