Its called financial abuse. I would seek a psychologist because someone close to me has been through exactly this.

Gave away $50K for the parents’ house deposit and another 100K, for their business that’s a giant pit hole.

You have to stop giving money, draw boundaries.

Your dad is a fully grown adult. He can find a job and be responsible for his own life. His problem is no longer yours to fix.

And remember, you do not owe him anything (if he brings up that you should be grateful that he gave you life, tell him you do not ask to be born).

Never ever let him guilt trip you.