Riot needs to address the gap between "Casual" and "Hardcore"
Riot needs to address this huge gap between "Casual" players and "Hardcore" players. First, let me define the two:
"Casual" means that a player does not really care if they win or lose, or if they are good at the game. They just want to have a good time, which isn't really a bad thing, but it can be bad
"Hardcore" means that a player really cares about winning or losing, and they want to improve their skills in a game to get to a higher rank.
Just by understand what these two terms mean, you can understand the great disconnect between the two types of players; Casual players don't really care, while Hardcore players do. This isn't really a big issue in normal games, because it doesn't really effect either side at all. Normals in general are for practice and just for messing around. This becomes a HUGE issue in ranked, however. The main issue I feel is that people mistakenly refer to "Casual" gamers as trolls in ranked, because they don't really care if they win or lose, or if they afk or feed. All they want is to have fun, which is fine, but they forget that there are people that actually want to win the game too. They don't see ranked as anything different from normals. Hardcore gamers then tend to get salty and rage if anyone starts losing or feeding or afk, since it really effects them psychologically. What I am saying, is that Hardcore gamers need to matched with hardcore gamers/people who take the game seriously, and likewise for casual gamers. Myself falling into the "Hardcore" category, I feel that this is an issue, especially on weekends, since you get people who just really don't care if they drop you down 50-60 lp for a loss because they just want to screw around.
Tl;dr Riot, you need to either make ranked a bigger deal, so that people are actually motivated to try in ranked games, or you need to differentiate between "casual" and "hardcore".