What happened to adc's in high gold

If you think that adc's in bronze are bad.... Lately I've been trying out support role again and very often I see adc's going in melee range 1v2 into burst type adc/support when I play a champ like Soraka or Sona and afterwards hardblaming the support... Yo what happened to adc's 2k17 in this elo? Is this normal? It's the typical rant: enemy botlane is perfect, my adc is someone who counts on everyone else to win :')
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