Forced to change my username

So not impressed with Riot forcing us to make new user names. So my username that ive had for years since the beginning of me playing games, i cant use. Basically Riot, it wont take long and ill forget this new username you have forced me to make and for the inconvenience of trying to recover an account or write down the username and have to look it up each time, since your client doesnt seem to actually remember users. Honestly, this game is dead to me now. Moving on with life.