Maybe Riot should look into removing the XP loss people get from playing Coop V AI games
Honestly I feel like they should get the same about of experience from those matches as they would playing a PVP game of league given how low quality actual PVP is right now. As a new player you would be spending about the same amount of time in your AI matches actually learning the basics and yet you'd end up getting less and less Levels for it because Riot basically forces you into their cancerous unfun Multiplayer environment where matchmaking is terribly unbalanced and lopsided.
Or at the very least look into making the XP gain equal until they hit level 15 when they actually have everything unlocked to play the game properly, because don't for a second try and spread the lie that Runes aren't a game changer on their own and are completely optional.