Poker is mostly luck. Elite players sometimes lose for months at a time. It takes a LOT of hands before you can expect your real world results to converge to your EV results. It is certainly possible to win in the long term, but results from a single session are very loosely correlated with skill.

Any individual session of poker is mostly luck. I say this as a winning poker player. The edges are very small and the variance is quite high. There is a reason it's so rare for the best players to make deep runs in the WSOP Main Event.