If your speed controller looks like this one
You can’t really necessarily change the settings without changing out the speed controller for a proper VESC, which a few of us have done, me included.
If you’re looking to change the throttle curve and your remote looks like this:
There are some basic acceleration and brake adjustments on the remote that you can change (I can’t exactly remember what they’re called or how exactly to get there but if you play around with the settings menu, it shouldn’t be hard to find)
Adjusting settings in the remote unfortunately won’t fix the jerky throttle response.