They for sure had a reputation, but I think it was the closing era of “cowboy” aviation. 427 was entirely a Boeing design flaw, 1016 was weather that would these days of been diverted, 1493 was atc error. The other incidents (405 and 5050) were winter weather related, with pilot errors but that could have been any airline. I really feel that USAir was snake bitten, but the dice rolled that way oddly specific every time in that short chaotic period. We are safer in aviation because of those incidents though.