people that say support then dont support at all

over the last week i have 3 that said support. game starts then the player dosent buy a sightstone. that was strike 1 and strike 2 is they wont run setups to get me kills as an adc. either xin takes the kill via auto attack or with the knock up itself after i hit my skill shot. strike 3 is easy and makes me madder than ****. player says support in selection and the adc slot is open. and they have 0 intent on playing like a support. if they wanted adc they should have said adc. if your gonna break the meta with a champion at least play the basics of the role the same. i dodged the 3rd xin support in selection. rather lose 3 lp then deal with a troll.