I don't know why. But, I feel demotivated whenever I play slots because I had a bad experience with slot games. On a platform (Don't want to mention the name), I had deposited 10mBTC and I got 100 Free Spin. Would you believe that if I say I win 3 spins only and the total was about $4? That 100 Spin was worth about $50 according to the specified game at that time. I have tried slots a few more times. But, My luck sucks.
We won't be surprised because we already understand how slots are played even we got worse than that one of the factors is the games provider
Maybe you play games from providers that are difficult to win but when it's time to win it will be your biggest win multiplier x10,000-66,666
This is called first experience will determine whether you are addicted or not at all.