About the Adc's riot

Now instead of looking at the more common adc picks As in , , can we look at Adc's that are doing bad?Like , , , ,,and ....no one but Mains play them and they all hardly make it past a 50% win rate.....Lets all let that sink in...Amd it's not like Adc is an optional role you have to have it so the fact these champions have very low play rates and hardly break even shows SOMETHING is fundamentally wrong