Don't mind the GG EZ stuff.
After awhile you will realize people type GG EZ because they have no idea what they are doing. I had match where opponent team lost at the ended of a match in a 20min surrender fashion with a 5X:1X score and still type GG EZ to our side.
Same as most bm actions. like mastery spam and stuff. ( a riven with 0/16/2, finally got a kill (1/16/2) and then started to spam that mastery icon until their entire team raged at him/her).
Same as the "?" ping and stuff..... pinging a mage/adc to the front line. or pinging an assassin assassinate a opponent adc....
All I can say is, if you really want less bm interaction; aram seems a little bit better or else you need to work your way to mid diamond. (they don't rage or bm that much. except the mastery spam)