To be fair, the way they promoted themselves up to and around their launch was pretty OTT both in terms of overhype and corporate buzzwords and self-promotion that oozed condescension toward the existing teams and structures which rubbed a lot of people up the wrong way. I mean, every single element of Team Sky had its own article and press release in early 2010, where they touted their scientific approach and advancements in such revolutionary fields as "Team Sky prepare sprint train in sprint training" and "Team Sky prepare for time trials with new time trial bikes", all while hyping their revolutionary new science-based approach, which lots of existing teams who were doing everything their budget would allow in that direction found patronising and disrespectful, before you got to Wiggins' "Wigan" comments about Garmin and claiming "it's like we won the Champions' League" after winning the TTT at the Tour of flaming Qatar.
Plus of course, they got a lot of lessons in 2010 about how road cycling has an awful lot more variables than track and requires a lot more adapting to. Once they did adapt, they could apply the lessons that they'd learned, but after all that bluster, it was no surprise there was a bit of triumphalism about their underwhelming introduction to the sport and that set them off on the wrong foot with a lot of the fanbase before they started behaving like US Postal and inviting those comparisons until people made the ones they didn't like.