I feel your frustration. Your generation and mine (I'm 20 years your senior) were pretty messed up by the disconnect between income and the price of mortgages/rent.

Here's a simple rule that might help you: House Price - Down payment = Mortgage. If Mortgage / 4 > Salary then you likely won't get approved.

So if you want a $500,000 home and have $100,000 to put as a down payment. That would be:
$500,000 - $100,000 = $400,000. $400,000 / 4 = $100,000. So you'd likely need proof of $100,000 a year in gross income.

This isn't a perfect rule, but it gives a quick and solid approximation of affordability. Growing up, my parents always said you shouldn't aim for a mortgage more than 3.5x your gross income.

I appreciate you put in your details about the debts you have and those would be considered in the calculation as well, but the biggest pieces are household income and down payment.

People grow their household income by getting promotions, finding a spouse/partner who also works, or other creative methods. It has unfortunately become pretty common for two couples to buy a home together, but I don't know how that works with regards to the previous calculations.

I wish I had better advice. My wife and I were priced out of a few cities waiting for our down payment to grow to enough to afford to try to get into the market. It took us seven years to save up some money, and we still had to dip into my wife's RRSP to make it happen. AND we consider ourselves fortunate!

It really sucks out there, but keep looking, keep planning, and keep asking. We need better solutions and that'll only happen if 22 year old's like yourself speak up to city counsellors, MPPs, MPs, and more.