It feels draining... (tired of gambling)

Besides the thing that the whole game is RNG-based, one of the golden rules of this game is "never trust the max amounts on RNGs". Do you think you actually have a chance to get 330 shards in those 5-330 packs? Well you don't. Or at least the chance is between 0 and 1%. This is one of the awarenesses you should have in playing the game. Never trust the max amounts, they're mostly smoke and mirrors. If you feel like buying, just spend on the packs with fixed amounts in them and fixed money prices. The whole thing is just a gambling thing, because by frustrating you with the lowest possible reward in RNG packs they push you to spend more and more, just like a slot machine. They were criticized for trying to do it even in BF2, but just because mobile games are a smaller reality and everyone knows that they are mostly p2p, so noone complains about them.