There's a lot of narrative rewriting about Lost because it ticks many of the boxes of what was supposed to be - in terms of diversity, and expansion of network television mindsets - but at the time, the show mostly got buzz in that first season. The second and third seasons got a ton of negative response (especially the third) and even when things stabilized after that, there was a great deal of mockery of the navel-gazing "mystery box" world to help hide that there were no clear plans in place.
Even at the time I remember fans pointing out what hacks Lindelof and Cuse were. That's true for fans and producers in general, but that label has stuck, deservedly so.
I always got bad vibes off the show, as well as Desperate Housewives, and consider both to be classic examples of narrative and media hype mattering more than the product itself. I'm sorry to hear just how ugly the atmosphere was backstage at Lost, but I can't say I'm surprised. It's one of those shows where the vileness bled onto the screen, especially in the deaths of those (mostly non-white) who were deemed unworthy.