You accidentally touched it ALL the time leading to random functions being called. I had to turn it off. A capacitive bar right on top of the physical buttons you use all the time was not a fantastic implementation. Apple reverting it is testament to that.
I found it the exact opposite - I very nearly never touched it. My problem with it was you need to look at it to interact with it, which meant you weren’t looking at the screen.
It felt like someone designed it and said “but that won’t be a problem, because you can have the bar show you what you need” without considering it’s impossible to see what’s under your finger.
If they’d somehow put it at the same angle as the screen, so you could interact with it and while focusing on the screen, it could’ve been amazing - for me at least.
I do not recall ever accidentally touching it in the two years I had one. However I did not like it replacing the Fn and Escape keys. Having a section of contextual keys and controls was nice but not to replace the top row.