Don't know anything about Quebec politics, but I did a quick read of the party platforms and it seemed like every party except PCQ was offering heavy spending commitments in every area without raising taxes, which seems concerning at the provincial level. Also every opposition party has some crankish nonsense that they're likely only promising because they knew they weren't going to be forming a government anyway. Like for some reason PLQ want to put $450m into a public psychotherapy programme.
There is a fund to pay the debt which is very plump, that's where they get the money.
What's wrong with public mental healthcare?
Nothing wrong with public mental health, just psychotherapy is woo. And to be fair yes you'll know more than I do about Quebec's budgetary situation.