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
The first thing that an investor and a trader should learn is to only invest what they can afford to lose, there is no shortcut to that, no traders wins everytime losses are imminent, it's something that cannot be avoided, if we invest only what we can afford to lose, we can move on, learned a lot and make the right decision next time.