Howard was decent for a few years to be fair to him, but there in lies the difference. You question why Pickford is criticised, and claim he is miles better than anyone we've had for years, but in doing so, criticise Howard. He was by no means spectacular, and of course he made mistakes, as you rightly pointed out. But he was never able to live them down or redeem himself, despite being, for the most part, a reliable, consistent presence who's record was pretty good.
Pickford on the other hand, gets talked up like he's some kind of saviour before he's proved anything. Like I said before, the criticism as you put it, is simply people seeing a keeper who averages 60+ goals conceded in 2 consecutive seasons, someone who makes the odd spectacular save that he has no right to make, but who can be erratic, doesn't keep it simple and keeps very few clean sheets. Criticise the defenders all you like, but like Howard before him, he is part of that defensive unit, not separate from it.
I made the point a number of times about Joel, and he got it so much worse than Pickford ever did, with not even a fraction of the plaudits. He transformed the defensive performance of our team for the better in 3 consecutive seasons, under different managers, replacing different goalkeepers, and behind different defenders, yet got zero credit for it. In fact, on each occasion, according to fans, we improved in spite of Joel, and it was all the defences doing, even though we had been poor with the same unit prior to his inclusion.
Again, Joel is another who was steady yet not spectacular, and again, made the occasional gaff, but got way more than his fair share of criticism for it, to the point that no one would trust him or allow him to improve or redeem himself either.
Im not saying Pickford won't be good, and I'm not saying I don't want him to be good. He has the potential to be much better, and maybe our long term solution to a key position. But I'm certainly not of the opinion that he is anywhere near the level yet as some will have you believe.
For me, he has a long way to go to even reach Howard levels yet, regardless of whether he has the potential to be better or not, and the odd spectacular save won't convince me otherwise, until he becomes the steady, calming influence, all good keepers are, and becomes part of a reliable defensive unit. For me at the moment, he is still far too rash and his distribution and decision making is questionable. But hopefully, that will come with experience.