I recommend reading The Anxious Generation - it is extremely hard as a parent to control phone use (especially when they’re not banned at schools), and the internet today is much more engagement driven than the internet before phones. As a parent, I will be doing my best with my own kids to teach them about the dangers of social media, but it’ll take societal change to really address this problem.
I strongly believe that the younger cohort supporting conservatives is social media driven.
Yes we are going to waste this opportunity (independent of who we elect)! Provincial governments are in charge of funding universities and have been consistently decreasing funding for decades and simultaneously cutting off any source of revenue. Most universities in Canada are struggling financially and will have a very hard time hiring anyone in the short term. There will be some counter examples like the ones at U of T, but this will not be the norm.