omg there are so many difficult jumps its like a 1990 platform game... now further into the game they are putting several difficult jumps in a row.. just hating that bit... im stuck on ony jump now ive watched youtube how to do it but i dont seem able to make it i fall a few pixels short of the teleport boost every time...
I put this on nightmare and am perhaps regretting my decision
Stuck on a certain point and just can't seem to keep up with the enemy spawn rate or run out of ammo.

I remember to playing DOOM on the PS1, can't quite get that atmosphere though.

don't really get all the complaints about the jump puzzles, I actually find it a nice change of pace as the combat is so intense and really tough unless you're playing on easy mode. The jump puzzles aren't hard either :/
And seriously the timing is so slack on the mojority of them it's just a case of double jumping and boosting...It isn't really about being hard or easy it is about the flow and pace of the game.