I have seen TOS. It is my favorite Star Trek series. And even in TOS is was clear that the goal was to portray humans as better than they were in the 60s or even today in a lot of ways (though they could really have done more when it comes to equality between genders). After all it was one peaceful united Earth with colonies and they were in a union with other alien races. The look to the future of humans was clearly a hopeful one. Individual assholes and idiots still existed of course, but human as a whole have learned from a lot of mistakes of the past.I guess you never watched TOS.
While Starfleet officers strove to be better the average everyday human didn't. And even Starfleet officers broke on occasion.
It wasn't a cynical look which feels like PIC will be when they use the Federation to criticize US and UK politics the makers of the series don't like. Their stated goal is not to look at the best aspects of the USA and UK and extrapolate that to the future, no they want to take the things they like the least about those countries at the moment, give those aspects to the Federation and Starfleet, so they can tell a hero vs. bad state/society storyline.