I have not seen a trader that do not lose sometimes, i may be new to the forum but been learning before now. it has nothing to do with sentiments but traders have to learn to accept trades the way it is, without attributing loss to any factors; as it leads to more rekts.
Always accept the market as it is without blaming any factors.
Always dyor too
Losing is normal, and controlling your emotion is so hard that's why many traders losses money. As a trader we have to set are target, a cut loss level and profit taking price because if we continue to hold even if we are losing, our money will be gone totally. DYOR is so important because you can't trade without having doing this or else you are just speculating the price without having any back-up plan, which means a loss later on.