Hmm, no I disagree strongly. I quite like Pixar's stories. In particular I appreciate how differently they come off to adults vs. children in ways that feel meaningful to both. As a kid, I completely missed what were obviously concerns of Mr. Incredible's infidelity. In the emotions one, kids see the obvious narrative that the emotions control the child, whereas adults are likely to see the emotions as a metaphor for feelings and growth rather than zany cartoon accidents.

Up's primary theme was the importance of letting go of the past to focus on the future. Soul was that you don't have a divinely foretold purpose in life other than living your best life. Inside out was about recognizing the importance of negative emotions- and that while joy is good, sadness is not bad. A lot of these are heavier and more mature than you'll find in a randomly chosen piece of fiction intended for adults, but I wouldn't say they're sad so much as thought provoking.

Some of it is really bleak. I mean, a fair bit of soul is a guy realizing he wasted his life, and then died right before doing the thing he thought would give his life meaning. But like... Grappling with that feels like a really meaningful conversation to have.

edit: although I don't feel as strongly for their sequels. To some extent I find they phone some of them in...