No
I've finished A levels and although it was the most stressful two years (well AS wasn't so bad but A2 killed me) I doubt it'll be easier or less stressful than uni. Some say first year of uni is easier as I guess it's more an intro year but from year 2 onwards, haven't heard anyone say A levels were easier.
Also depends the course, I doubt A level maths even touches the difficulty of degree level maths