+1 Thank you, DongQ.
And your posts have always been agreeable (albeit straightforward) and echo, frequently, what is on my mind as well.
“Estimate”, “approximation”, “aggregate” are same of the appropriate words; i agree.
xQc is a very good example, i also agree. At his best, he is up there with the likes of Gesture and Fissure as a Tanker, maybe even more so especially with Winston and likely a more balanced Reinhardt player than Fragi (although i still prefer Fragi’s playstyle and down-to-earth temperament).
Although, i am thinking now… just how much of his outbursts and “bad behaviour” is real and how much of it is a persona he is adopting as “xQc” the OW Tanker versus Félix Lengyel the man. 
Yes, as an “older” adult who is a parent, employer and previously an educator; i share your concerns as well. Which is why i have been making an active effort on these forums to be as encouraging and positive as time and situation allows.
I think that it is a wonderful thing that Overwatch, being just a video game, has touched so many lives across the globe. It really is a global phenomenon.
It has brought much positive influences into so many hundreds and thousands of lives with this being such a one:
It has also brought people together (shout out to my buddies in the U.S. made from these forums in particular, Tactician; LeaF; Craver) and just brought many hours of fun into otherwise mundane lives (speaking of hours, look at TreeBoy Dave!)
Yet, on the other end of the spectrum, there are so many people who are “feels bad” or worse over the SR = Skill so if you are in the lower Tiers like me, You Suck; You don’t belong; Git Gud or Git Out etc etc.
I think that we cannot underestimate just how much impact Overwatch has in the lives of its millions of players. I am certain that it figures very very prominently in their lives. I mean, even amongst my little family of four; it is a topic of discussion and passion between my children and i. We have bought the artbooks (4 copies), we have some of the toys and my daughter is looking forward to the Lego sets while my son wants the Nerf guns (especially Reaper, his favourite character). We all watch the OWL to varying degrees as well.
So with that said, it is understandable that people would be affected due to SR because, well, it is a basic human need to be respected and to feel like they belong.
If it is one thing i have realised after reading so many topics and posts in the past few months in these forums and also observed the behaviour of people in game; is that well almost everyone makes light of the lower Tiers, even though Silver and Bronze makes up a whopping 29% of the player population.
Now, i say, “make light of”; which is not insulting or bullying but very much like dismissive. It is this general attitude from the Top down the Tiers, i believe, which makes people very aware of their SR because people want to feel valued and respected and the only way to be so in the game which has so much impact in their lives and figures so prominently, would be to be high up on the rankings.
To many, i believe that:
It is just a (video) game.
It is more than just a game.
It is a my life’s game.
It is my haven, my passion.
/sigh
P.S. apologies for the long winded post. Just something to share since we are the topic of how SR appears to have such an effect on the players, in general.