For me, the prep was bad. I didn't know you could use Gatorade to make it taste better. I think there are also pills you can take now which would be way better than the liquid.
But like you, I don't remember it being all that terrible once I forced the prep down. Plenty of diarrhea but you weren't glued to the toilet. And the procedure is a breeze. Fall asleep and wake up.
If anyone is younger than the guidelines and doesn't want to do the colonoscopy, ask your doctor about the poop in the box option. I did that before I hit 50. It's not as good as a colonoscopy but it's good.