Of course. I'm not going to deny the Blair governments implemented a lot of stuff I'd agree with. But they also pretty much accepted Thatcher's economic doctrine tax-wise, maintaining fairly low rates and completing the deregulation of the banks, while introducing PFI and handling Iraq catastrophically. All-in-all they achieved a lot, yes, but they also fundamentally alienated a lot of their core base while not really winning a new core base - a lot of the right-wingers who were more likely to vote for New Labour quickly shifted back in 2010 and 2015, meaning the party was left with a fairly alienated and disillusioned core base that hadn't been listened to and that were crying out for someone like Corbyn. Most reasonable lefties can admit Blair achieved plenty of good - the criticism leveled at him is he didn't do enough, and considering the state the Tories were in during the 90s he'd have won an election comfortably if he'd been a little bit more to the left, as evidenced by the fact Smith was doing fairly well polling-wise until his death.