https://us.battle.net/forums/en/overwatch/topic/20754415323#post-1 In that post Scott Mercer states that "Based upon our investigations so far doesn’t look like there’s a broad systemic issue affecting all supports across all competitive matches." But if you read the thread supports mains will tell you, it is indeed happening. Personally ive seen it happen. Ive played Ana and solo healed in comp before only to gain 18 or so SR, while the DPS gains 30-ish. So if youre a support main, and feel as if Blizzard doesnt give a fuck as to how youre doing, i understand. This issue has been around since season 2 and is frustrating as fuck. But there is a light at the end of this tunnel. Scott mercer also stated "It also might be something completely unexpected, so we’re doing a thorough examination of all the code that affects SR adjustment." So hopefully...hopefully they will actually take a hard look and fix this issue.
Here: https://us.battle.net/forums/en/overwatch/topic/20754415323#post-4 is another support mains view of the issue, sounding familiar?
Your OverWatch made a good video about this, in it he explains the "apple vs apples" type of SR gain the thread talks about is fucking retarded.