You share a real experience that is almost felt by all slot players. Luck only gets a few small wins and more losses in one game session. Sometimes it can be profitable with small wins, but for gamblers who do not have control of the game, what happens at the end of the session is just lose all their deposits.
Wins obtained at the beginning or even the end of the game, near the balance running out, will only prolong the game until finally losing everything. Because we definitely think that at the end of the round, we might get a big win.