You guys never played online shooters?
15 years since I started with C.S 1.6, the "toxicity" in Overwatch isn't something new, or exclusive property from the OW community, and it's NOTHING compared to what you'll see in, for example, Counter Strike G.O with 5 people yelling at each other "PLANT THE BOMB YOU F*CKING RETARD", "gg noobs, kill yourselves", "hey, go fist your mother kiddo" (the last one is actually true, heard that yesterday in C.S G.O xD)