Why are HD remakes so poor? Is it our ignorance or is it just bad porting?

Maybe we cling on to the fact that the game is better on its native console, than its modern counter part. Personally, I blame the companies who ported them. I am guessing they were never a fan begin with by the way they butchered it. Why not give it to someone who is a fan of the game instead of a shitty little company that no one has ever heard of.

I know some of the HD remakes are pretty good but was is it luck? Maybe they just ported it and added HD graphics. They had to do something other than that. Maybe they were fans and cherish the product.