why some slot games have wildly different mechanics than advertised

Been spinning some new slots lately, and I swear the features they show in promo videos almost never turn up when you’re playing for real. I get that bonus rounds can be rare, but sometimes you see them showing off 5 different mechanics and then 90 percent of spins feel like base game snooze fest. I’ve seen wild symbols that never get wild, sticky features that might as well be glued shut, all that jazz.

Anyone else get baited by flashy mechanics that never actually show up, or is it just my luck lately?