The main reason why you probably won't be able to reset your stats on your own is because it wouldn't be fair to the people who've played for a very long time and have decent stats. They may not want to reset their progress and redo all of the work. When you start from scratch it's much easier to climb up the ranks due to you having no negative stats at the beginning. For example, say two people with 500 kills and 100 deaths try to compete for a higher rank. At this point they both have a 5.0 kill/death ratio. Person 1 doesn't want to reset their skills, but Person 2 decides to so they can get ahead easier. After the competition is over, Person 1 has 1000 kills and 250 deaths, but Person 2 reset their stats and has 50 kills and 5 deaths. Person 2 now has a 10.0 kill/death ratio, while Person 1 has a 4.0 kill/death ratio despite how much more work they put in than Person 2. Person 2 wins with far less work than Person 1. There are more factors that go into a few of the more advanced ranking system like Murder's, but this is essentially the basics of it. In other words, allowing users to reset their stats would punish users who don't, regardless of how much work they put into their stats. This simple concept applies to almost every stat-based leaderboard in any game that allows users to reset their stats. For these reasons I am against being able to reset stats yourself.
It would be a different story if everyone was forced to reset their stats at the same time on a monthly basis. If perhaps only the stats reset, and not the cosmetics/currency, then perhaps a monthly forced reset wouldn't be entirely a bad idea as we could have monthly leaderboards and/or rewards. Even so, we usually save that kind of thing for events so it might not be likely to happen normally, but still possible and definitely much more appealing than the previous options.
