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They go for it and don't think for another second, bro I am not blaming you but I think this could be the reason although you know better you are not newbie have 5 years of experience in trading so you must have known till now where you was wrong.
Many people make mistakes like this despite being said to be old traders, but they don't learn from the many mistakes that occur.
The main problem is not his knowledge but his mentality which really cannot be controlled.
Too FOMO when the price goes up and don't buy again when the price really crashes, even sell at a low price and get a lot of losses.
5 years is not a short time, it is a time that makes a person well shaped by the market and should have good self-control as well as more expert trading knowledge