In 5 star shards crystals??

I open 5* shards crystal and now ı have collosus. I need archangel or ıce man for make story adventures . I think like collosus hero's delete in 5* shards crystal. Because we playing long time ( 1-2 months) and after we have bad heroes.
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But again, who decides what is a "bad hero"?
Old heroes need update.