Some might agree but 30 crate keys are actually not hard.
Instead of opening your vote keys everyday maybe save them for the levels and open them at once, it's not that hard
The other ways may be opening a vote/epic key shop or buying them from /ah or from other players.
OpSkyblock has the best level rewards compared to other modes, with player level premium pass u can get over 70godly, 70unique, 45 mystery crate and 22 seasonal keys so the level tasks have to be challenging as the reward is big