Is this how most people type on mobile these days, drawing lines all over a keyboard instead of tapping the individual keys? I’ve never had an iPhone so I don’t even know if they can do this natively, but I know you can switch keyboards at least, so it should still be an option if not.
You should be able to change it now, there are other keyboards on the app store at least.
I didn’t even realize there were options, usually it’s Apple’s way or the highway.