I had bad run on slot games lately especially with Fruit Party 2 as I did not get any FS after more than 5 hundred spins, I think it is my worst experience with Pragmatic slot.
I think I should stop playing slot games for a while and back to my other favorite game Crazy Ball aka Plinko.
I think you pick the wrong slots to play the "long game." That's the "problem" for high volatility slots because the longer it takes to bounce back (big win). You can down a lot before getting big wins. Thus, you need massive budget like what roycilik did.
Try medium volatility one if you play casually since it successfully brought my sanity back.
To be frank, I do not really care about the volatility of the slot games I like to play

As long as I like it (because of some reasons such as the UI or its feature), I'll play it as much as I wish but I will stop if I get no good wins after few hundreds spins.
Coming up to budget, I have limited budget unlike roycilik. I'll say $50 per session and I usually use it to play 1-2 slot game only.