Well, the x30 wagering requirement in slots is unpleasant, but it's worth noting that this is far from the highest requirement compared to other gambling platforms. If I am not mistaken, there are gaming platforms on this forum that have the x40 wagering requirement for the welcome bonus.
There’s some casino that even requires x75 wagering requirements or more but most of the count all games but with different multiplier on each game such as 1:1 on slot games, 1:0.5 on live games and so on.
Honestly, wagering on slot games is the most difficult way to gather wager to complete wagering requirements of bonus since you will need to hit multiple medium high multiplier or a massive win just to have enough bankroll to wager more and absorb tons of dead spin.