How would you deal with this situation approapriately?
So I joined a normal blind game.
I typed in top (first), and then locked in 
Then I notice that the text below mine says top and then the guy locks in
, I tell him that I was first. But he kept on argueing against the rest of the 4 people in the lobby who sided with me on this matter.
So I thought for the sake of the whole team, I would just go support
with the adc
.
.
.
.
For those who are curious this was our team comp:
Top lane:
Mid lane:
Jungle:
Support:
ADC: 
Anyway, we entered the game and then everyone starts to question
about why he just instalocked like that which I felt happy about that the rest of the team had my back on this knowing I was first.
But things got a little too heated for my liking and after a minute or two everyone begins flaming him. Yeah sure he locked in and all but "it doesn't matter" I said, "let him play the role even if he didn't get it first". But then everyone besides Katarina called him all sorts of names, and got really offensive. Not to mention he wasn't doing too well which really infuriated
.
in particular called him "Canc#r" "Piece of sh#t"
At the end of the game, in the lobby ashe said the following words to jax:
"enjoy" "ban" "piece of sh#t"
https://i.imgur.com/TYlNwM9.png
I hid the names of my team-mates for the sake of the Name shaming rule, to those wondering.
I reported everyone besides
in my team.
Not too long after I am greeted with this message...
https://i.imgur.com/hsjzNB7.png
.
.
.
I didn't really felt quite happy about being the support in particular as
even if I provided decent catching, defensive tools such as Q knock up, E slow. I did however saved
a couple of times by knocking up any enemies chasing her and slowed them with my E. I think
was quite the only sportslike player in my team.