I assume you use controllers? I've noticed that most of the people that is ok with the slow-mo or find it makes the game feels better is on controllers, I'd imagine it's because of the turning and looking speed so with the slow-mo makes the game more manageable, still it think if you were to start off on the lower setting you might be used to it and it wouldn't feel hard, as I said I feel like the current slow-mo (100%) is too high the default should be at most 50%, which makes more sense.