It is not clear to me that the strategy is a good one if most of them end up losing money. I do think a lot of it can be due to the other things you mention, like not managing funds or emotions, but then they are moving away from the strategy. For one thing or another I think that if you want to make money you better invest for the long term and if you want to make trades that are punctual in time. The more frequent the trades, the less likely you are to make money, either because of a bad strategy or because you mess up.
Another thing is that traders should not think they can make money daily from trading.
Have you changed your opinion since our bet, then?
I think not so. It is not "the more frequent the trades, the less likely you are to make money" Reason been that a studious trader that have good observatory skills will make more money when he/she trades the more. Rather i will say that the more you trade the more likely you are going to learn the fundamentals of trading and learning from your mistakes ;which will in turn, reduce losses and increase profits. Thus, the narrative will be: the more you trade the more you learn how to reduce losses and make more money