Dustshoot is not the best card in the game. Best card to draw on turn one, yes, but can often be very dead or even miss getting a target. Theoretically the best card, but it isn't going to work every time.
nor is heavy storm going to work for you every time (especially against sworns, for example). my main qualm with dustshoot is that it is impossible to play around early-game. you cannot stop them from putting back a key card and from knowing exactly how to play the next several turns due to their knowledge of your hand.
'best card to draw on turn one' is kind of moot since it has, in my opinion, the highest maximum potential in terms of ability to swing the game in your favour with no required input from your opponent. heavy storm is better if they're terrible and set 3 with no solemn/chainables. jd is better if they overcommit. im aware of all these points, but the fact that you can turn one get such a huge advantage and your opponent cannot do a single thing about it is ridiculous.
Okay fine.
Best card ever made = Pot of Greed.
And Dustshoot hardly "seals" the game for you if you don't have anything to back it up.
if you dont have any possible way to capitalize after a dustshoot for the next several turns your deck is probably not very good. you don't seem to understand the importance of knowing exactly what your opponent has in hand for the turn, and what 5/6 of their cards are the next turn, and so on and so on. you suddenly become pegasus with your millenium eye. there are so few ways in this game to see what your cards your opponent is working with, and really, a splashable 'no reason not to play it' card (which is why im not hating on cards like spiritual water art - aoi lol) that does just that and sends back a card in their hand really shouldnt exist.
i agree of course that heavy storm is a very powerful card, but i think it's a necessary evil. of course it sucks when you're in the position of something like 'ok if i dont set bottomless i will lose to thought ruler but if i dont set dprison i will lose to stardust' so youre kinda forced into setting both and then you get raped by heavy storm, but that situation is EXTREMELY rare if you know how to play. it's a necessary, because i don't think you should be able to set 5 s/t opening hand with little to no ramifications. also id say its balanced because both skill drain and royal oppression are unbelievably powerful cards that both should not be at 3 per deck, and storm is a good check for them.
id say that storm should be banned if the game were significantly reworked in terms of lots of restrictions/unrestrictions/bans, but that its currently healthy for the game. i dont see how anyone can make the argument that dustshoot is healthy for the game. if you lose to storm, stop setting 2 instead of 1, and start playing well enough to not force yourself into a position where setting more than one s/t is necessary for survival/control.