IS int sion strat actually bannable ?

I been playing sion in ranks at lower elo and manage to get great results so far even if my KDA is terrible at most games I still manage to get atleast 3 towers per game and do a great macro play. However last couple of games my team keeps flaming me that I'm useless and constantly inting , I will get a perma ban and so on . If that's true why is that ? I heard Riot been bannng singed support mains back in the day when they did pretty much same gameplay -prox your lane , hard push minions get objectives even if it gets you killed.
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