Experience matters in trading, but some traders will continue to lose because they will continue to fail to adjust. They might have in mind that they will not let emotion controls them but after they open a position, all they will find out is that they later go against their trading plan which lead to significant loss. After the emotion, changing of trading plan and money loss, the market will later reverse back in a way that would have favoured them.
It's healthy that you still feel emotions imo, that means that you're not totally a slave to money, if I'm being honest it's okay to express the emotions instead of bottling them up, the key to not affect your trade is that you can control when you express it.
This is crypto. Another thing that can make someone to lose is the coin they are using. I prefer to use bitcoin and just bitcoin alone. There are some good altcoins too, but I prefer to focus on bitcoin. There are many altcoins that are gambling and they are shitcoins. The trader may be very good, having good analyses that will favour the traders if they use good coins like bitcoin, but using shitcoins will lead to losses and losses.
The beauty of altcoin imo is that you can make profits if you're one of the many first to buy the token, 2nd and 3rd generation buyers aren't that lucky because then they have to watch the price and hope that their initial altcoin purchase would generate them an acceptable if not adequate. That's where your skills in trading sharpens though, makes you great at analysis and predictions.