That’s a massive dose and you mixed it with alcohol. That is in no way a responsible way to try out psychedelics. You are right that everyone reacts differently which is why you don’t take a very large dose mixed with other drugs.

Anecdotally, ayuasca quite literally saved my life and helped me tremendously when I was spiraling into a deep depression. Psychedelics when taken responsibly in a controlled environment under supervision can help a lot of people.