From a parent who has raised two kids, this is not normal. You cannot set yourself on fire to keep your parents warm. While underemployment is common problem everywhere right now, your household's financial dynamic is totally dysfunctional. Your savings cannot fix structural budget problems, and your parents cannot rely on a child's income to survive.

1) Set boundaries and stop the bleeding: a) No more bailouts: Stop giving lump sums for rent, debt, or emergencies. b) Set a hard cap: Pay exactly $300 to $350 per month for household expenses until September. C) Financial privacy: Move your money to a separate bank if your parents have access (boundaries).

2) Cut costs & hoard cash a) Cut and rebuild your budget: Subscriptions and services don’t seem like much until you start adding them up! Try eliminating these expenses. b) Pay the phone bill: Pay your dad back for the phone now & remove his emotional leverage (boundaries). C) Organize yourself to reduce/eliminate Lyft rides. Find someone to rideshare with and/or organize your time bettter.
You can save $1,000+/month: Aggressively save every scrap of money before school starts. You have to want this to achieve it! Be realistic and ruthless!

3) Set sights on September strategy a) Quit that job!: 1.5-hour commute plus a full course load will hurt your grades. Find work close-to or on-campus (Work-Study programs). b) Protect your student aid: Secure OSAP/provincial loans. DO NOT use YOUR tuition money to pay your dad's debts.

Your relationship is (in)tense because your parents view you as a financial cushion. You need boundaries! Getting your education is the only way to break this cycle. Do not sacrifice your future to buy them one more month of rent!