TLDR; i guess i wanted to ask that have you guys learned any lifehacks to overcome your weaknesses?
I hope there is something like "lifehacks" that exist. 
We are never alone in the losing end. Hell, those exchanges won't make anything without traders losing.
All you can do is learn from those mistakes.
I do make a lot of errors before and not just minimal. The greed that would cost everything.
But on the road, you will learn to be calm and make better decisions.
Exchanges will be just fine no matter is we are losing or not, as part of their funding model are the tx fees.
But by "lifehack" i meant more like a mind trick that keeps you focused when you need to act against every instinct you have. Like buying when you are afraid and sell when you are greedy.