Super tight and responsive movement wouldn't necessarily mean jumping puzzles make sense in a 90s single player FPS. Would also say what a tryhard is attempting on a server playing every day is going to be a fair bit off from the bulk of people who played through the main game.

My memory is that it wasn't the controls but the sizes of the spaces you had to jump to and the clarity of where they were so you could adequately position yourself that were the issue. The latter of which is probably more down to texture usage than the engine itself.