You don’t seem to understand what is and is not reportable, here is a quote from Scott Mercer if you don’t want to believe me.
To help with the accuracy and clarity of reports, we are making a couple changes to the player report categories you can choose. The first change is renaming the “Griefing” category to “Gameplay Sabotage”. Griefing is a very broad term used in many different ways amongst the community. The intent of the category is to be used when a player disrupts the game or harasses other players through the use of normal gameplay mechanics. A clear example of this is Symmetra teleporter exits being placed at the side of cliffs so teammates immediately drop to their death. Another example is players intentionally allowing themselves to be eliminated by the enemy team. This is often referred by the community as “feeding” or “inting”.
It is NOT gameplay sabotage if a player simply makes a mistake or has a poor match. Everyone does that from time to time, even the very best professionals in the world. Players can also have a rough match without a lot of mistakes, simply because the other team is making better plays and performing well. For a player to be reported for Gameplay Sabotage, they must intentionally be trying to disrupt and harass their teammates or actively trying to lose. Note that playing a non-meta Hero does not mean someone is taking part in Gameplay Sabotage. Players who are trying hard to help their team to win should not be reported, regardless of the hero they choose.
If you WANT it to BE reportable, then say so. But as of right now, it is 100% NOT a reportable option. If you do report people that go 4-5 DPS, then I recommend you stop, as that is abuse of the report system.