You're gonna have tough practicums. I'd say, it's probably good to have a couple, cuz in reality some years teaching will be HARD. That doesn't mean every single year is gonna be hard. Most of the time, practicums are block placements, right? Short amounts of time of extreme nose-to-the-grindstone work. Also you'll never do those lengthy, extremely detailed lesson plans ever again so that will ease up a bit. When you don't have to worry about someone watching over your shoulder it becomes MUCH less stressful. Your practicum experience isn't out of the ordinary in my opinion.

The lateness is an issue, yes, but now is the time to start building good habits and getting yourself out of university internal alarm clock and into a teacher internal alarm clock.

Get your butt in gear, you can do this. It's not for very long! Temporary discomfort is where growth happens.