I am writing after a mere 4 episodes in season one and I probably have nothing to say that has not been said by others in terms of praise and admiration. Still, writing this review 13 or so years after it ended, I am aware of the various doom and gloom disappointments in the show as it progressed. And I am here to either defend this or to heap additional blame. For years if not decades, the Hollywood habit has been to destroy beauty. I am not talking about sucking franchises dry with woke agendae, although that certainly is one of the symptoms. I am talking about the deliberate or accidental process of adding needless complexity, darkness, conflict, and unhappiness of all kinds. This even happens, remarkably, with sitcoms. It happens in every genre. But Heroes was destined for this destruction from its inception, because Hollywood hates virtue. What is most interesting about this process is that Hollywood will actually break its own craftsmanship rules, ie, continuity, in order to pursue the goal. Whether this is laziness, stupidity, or contempt for the consumer probably doesn't matter. From Young Sheldon to Game of Thrones, from New Girl to House to House of Cards to Cheers to Friends, this mechanism runs from fairly subtle to brutally obvious. I don't know when this started but I don't think, for instance, that Bonanza pulled this crap. In more recent times, Big Bang may have actually reversed the formula, moving from sad selfish characters to radically improved versions of themselves.
Anyway, most say that Heroes started well and couldn't maintain. Some say it pulled out of the nosedive in later seasons.
I shall see.