Leaver Buster, Leaving Champ select

I dont know if thats the same thing, but why must i wait so long to play after dodging a queue?

So Ive been a Moba lover since i had a pc. Ran smite and a bit of dota. So i know how to play the basics, just need to know the champs. So I learned a few favorites, and just got to lvl 30. I wanted to hit up ranked for preseason. I didnt dodge when the banned my garen because," Garen offers nothing to the team", nor did i leave the game when my team had 3 afks in ranked flex. So I get into ranked solo and duo queue, because im a loser with no friends, and tried to get a game in. So Ii get top yet again, and the jungle simply said top, took tp instead of smite, and locked in sion top. Looked him up online and saw he had a 40% win rate, average kda 4/8., Normally i dont care about stats, nor kda, but I had hoped since he took my top and was basically forcing me to duo top or jungle, hed at least be positive winrate. I dodged as im in my placements and didnt want to be forced into a role, not because I didnt want to, but because last time i jungled was previous patch and i did pretty terrible.

So Im ok with the punishment for now, as i have all day to game, but was is the purpose of longer queues for dodgers? It seems rather dumb to me. I guess the point could be argued that trolls would just dodge and go into queue again to do it, but most trolls would want to see you upset, and dodging doesnt allow that. So what is tehe real purpose of this.