Is the particle system hard to control for you, too?

I’m trying to make a grass blade mesh over a ground mesh using particle instancing, and it’s hard to control; got them floating, too random, not random enough, changing too much every time I click something that shouldn’t change that much, etc.

Is it just me, or what?

No it not just you,it blender defaults (ui) & settings. Not that the ui bad, its simply wrong arranged.