I'm sorry you feel this way. We all have setbacks and bad reef times unfortunately.
I just turned 20 so I can relate to your situation pretty well I think. I don't have a lot money to spend either since I'm in college right now. The thing I did was save for a few years before starting the reefing journey. That gave me the opportunity to buy a bit better equipment which makes life much easier!
I hope you won't give up on the hobby, but it's your call obviously. If you don't get satisfaction from your tank while making an effort I completely understand you want to stop. Hopefully you will return to this amazing hobby in the future and let the R2R community help you get the most out of it!