Not sure what the point of this complaint is. Rank scuming may be "possible" but the effort required to go up in rank "without being good enough" is too much to be practical. Seriously, unless someone is consistently winning then they won't rank up. If they're the type to get a win every so often then rank scum will only ever let them keep their rank.
Rank scum erases losing streaks. It doesn't create winning streaks. 10 minutes just to erase a loss and hope the next match is a win only to lose again and take another 10 minutes to reset is way too tedious.
More than likely if you find someone in your rank that's of a lower skill level than you believe their rank represents then it is way more likely that they were carried by a squad up to that point. (that is if you like to blame teammates for your own poor playing during a loss)
I think getting carried to a rank you don't deserve and save-scumming are things only the lowest of the low do. Sounds familiar?
Both these actions have the player at a rank that they don't belong in. They go hand-in-hand with each other.
Players who save-scum
are skilled at the game. I'm not saying they are tourney-worthy, I am saying they aren't trash. They can get themselves a win every once in a while, it's just that they mostly rely on their teammates for a win (in the higher ranks). That is getting carried.
The only difference is, when you get carried, you rank down very easily. Once you play solo (if you were carried by squads) then you will rank down considerably faster than normal, back to your own skill level and true rank that represents your skill. I know this, I've been through it. Mind you, I knew I was getting carried, and I did not mind ranking down. I expected it.
Cough, back to the subject.. save-scumming, on the other hand, erases losing streaks. Like you had stated in your post. Instead of ranking down to their proper rank, they simply reset their data back to the rank they were at, and whine about teammates. If a user is close to ranking up, and they are determined to have a rank (that does not represent them), then after 2 or 3 wins they will save. I've seen it, I have a sibling that does this, unfortunately. Of course, it is not always wins, it's the amount of points earned for a win. In S, winning 3 times, earning 1 point for each win will not be enough motivation to save-scum, than if you won once and gained 6 points in S.
Because save-scummers do this, they harm themselves and the people around them. You cannot throw a B rank into an S rank room and expect them to learn, and become more skilled. It cannot work this way, the S ranks are far more experienced with the game. The save-scummers hurt their ability to play the game properly (resulting in them losing more often and thinking they are bad) and they hurt those who worked hard for the rank.
Just a side note, if you save-scum rank, you have no bragging rights. I don't pay attention to useless letters besides names anymore, I pay attention to whether or not you know what the objective is in the game. There is no honor in bragging about how you got to S+ 99 if you don't play like an S+ player.
Rank is just a letter. Rank is not something you deserve; it's something you earn. Ahem, sorry, this turned mostly into a rant on my part. <3