Life would not be boring because you would have so much free time to do whatever you want because everything is figured out, you know everything so now or you can focus on yourself. You can go hang out with your friends or you could do something fun by yourself, everything would be figured out the world would be a better place.
Life would not be boring if all problems were solved because being bored itself is a problem. In the perfect utopia, there is no pain nor conflict, and there certainly isn’t time for one to sit and allow themselves to become sick of what is everyday life. Boredom itself is a problem, and so, if all problems disappeared, so too would boredom. Consequently, life would not be boring if problems were solved.