It's not unfair in its difficulty. It IS very unforgiving, but not unfair.
The complaint against setting a weapon on fire could be avoided by putting the item that is used to do so on the hot bar. Easily remedied.
As for the whole "the dodge button doesn't do anything" complaint, lighter armors let you move further back. Also, you can dodge to the sides, and timing a dodge allows you to strike back with a counter-attack.
I can attest to the game being challenging, but I can't help but feel saddened by seeing so many people say they will completely avoid the game, because one critic thought that it was too difficult to be truly enjoyable. If you see the game past the first two levels, and start to learn the ropes, the feeling of accomplishment that comes with beating a boss demon far surpasses those available in any game I have played in the last 8 years.