The current reform system does not do enough to reform players. Here's why:
I see a lot of people post here about getting banned, and plenty of those cases are instances where the person was extremely toxic and definitely deserved the ban.
But some of the cases I've seen involve people who are just bad at controlling their temper, or are not emotionally stable, reacting to trolls or harassment by being toxic themselves.
I believe that these types of players, if given the tools and time to recover and mature, could easily grow into the types of players who do not respond to trolls and harassment with their own toxicity.
For example, I used to trigger extremely hard whenever someone would tell anybody else to "kys" in my games, but in the years since I started playing league I've matured and learned how to handle it without starting a flame war.
This is why I think that upon receiving punishment for toxicity (chat restrictions, 14 day bans, etc. ), players should be given links to guides on how to better handle situations that frustrate them.
P.S. for the record I've never (as far as I can remember) received a punishment in-game. My days of flaming were before the punishment system became more strict. I simply believe that we could do more to guide and shape these players into better people who would not flame one another the instant their team gives up first blood (or makes other similar mistakes).