Hi magic mike,
It could also be the slots you are playing.
Some high variances slots tend to pay really small bouns a lot and the rare mega hit others tend to pay average bonuses 50x and the odd mega hit but these don’t bouns very often like bonanza.
if you are trying to just get 50-400x I would suggest blueprints or quickspin games but be careful not to chase on these slots as they rarely pay over 100x plus and always stay within limits your limits.
if you want 400x plus go with the high variances slots try primal megaways or 300 shields but prepare yourself for a lot of 10 to 20 x bonuses
best of luck