Agree, it's usually our emotions that mess us up. TA is all about probabilities and usually whenever I lost $ trading it wasn't because of faulty theory, but because I either

a) Didn't know something
b) Didn't have a solid strategy and fell back on emotions

TA requires a lot of study and a strategy that you backtested many times over. The less you have to rely on your emotions, the more you win. If you are thinking of buying in and find yourself obsessively checking the price and a chart, instead of referring to clear rules you have prepared, tested, and written down, it's usually an indication you are about to make a mistake.

It's definitely a roller coaster that's why so many people quit.