The click is usually recognising that you're "trading" is not investing, but gambling. Then going and learning what investing is.

Been there. Saw others and myself think exactly this: if only I had more discipline. You think you have a system of rules that crack the stock market. You think that you lose just because you can't follow this system.

That's an illusion of control. You don't have a system of rules, because if you had one, it would've been already exploited by a much more experienced algorithm.

You're biased. Stop gambling

The psychology is that it is literally gambling. It activates the same patterns in our brains. So read up on what makes us gamble and how it can be addicting and how to counter those urges.

You're kind of assuming there's some kind of clever strat you can do to generate free money, unfortunately the only real one of those is "have a ridiculous amount of money already". If you actually want the gains you gotta avoid gambling, which trading at this scale is carefully dressed up to pretend it isn't.

Imagine you had a particular "investing" strategy that actually demonstrably worked: people catch on, exploit the same thing you did, and then it'd be useless. Rinse and repeat.

You're 19, you're still learning. If you truly want to invest long term, invest in ETFs. What you're doing right now is gambling because you want a return on your money ASAP. But it doesn't work like that. It requires patience.

My advice is to forget about trading and invest in a good ETF right now. Learn patience.