If you have a screen protector, check your settings for the increased sensitivity. Swiping is difficult if the screen isn't set right.
SwiftKey also allows you to change or remove the haptic feedback so it doesn't feel like a typewriter.
They also just released an update to SwiftKey. You may want to make sure you have the most recent. I'm really enjoying the fix to the keyboard size. It's now longer humongous.
The Samsung keyboard and gBoard get pretty decent reviews, too. You may want to try them. Personally, I love SwiftKey and find it working perfectly in my Note 9 (after some minor setting changes).