It is hard to get big multi on PlaynGo slots, a really trash game. Another example of why we shouldn't chase losses, if it doesn't pay in 200 spins leave that slot.
I like PnG (older games) and Pragmatic because reasonable max-win and good RTP. But in the end, it depends on your luck.
Sometimes the formula "x-spins and leave" works, but sometimes you will get profit if stay for a long time. No way to tell when to ditch the game and move on.
Lately, I just play my favorite games without considering P/L and move on when I get bored.