There was a time when the people in charge of this franchise were actually trying to show a better world than what we have now.
And they still do. "Better" does not mean "perfect" nor does it mean "utopian." In fact, "idealistic" does not map to either of those silly notions either.
Much of Roddenberry's utopian "vision" is in fact repellent to many idealistic folk, as utopias generally are to anyone who doesn't precisely share the utopian planner's values. Roddenberry's idea of Trek came to represent social conformity, behavioral conditioning and suppression of individuality. It was not better, simply less messy than actual human life and therefore more comfortable for some.
Simply because someone else's idea of optimism is not as comfortable for you as Roddenberry's revisionist image of what Star Trek was does not mean there's anything wrong with their ideas. You know, maybe it's as simple as the fact that Abrams and Meyer and a number of the other writers and producers over the decades who have treated Star Trek as something other than utopian are simply more observant, better writers and/or more subtle thinkers than Roddenberry.
That's pretty certainly true in the cases of at least some of them.