Hey @koko0, that exercise is extremely difficult but it’s all about getting you used to dealing with all the issues you have mentioned as well as training your eye. It’s like lifting weights for your skills. It’s designed to make you stronger.
One thing you might like is to ‘normalize’ the graph editor view.

This will scale the view of the curves so they all are the same height. However, this can be deceptive about the real value and slope of the curve. I’m not a fan at all but I know people who are – it’s a matter of preference but it sounds like this might be something that you will like.