I shouldn't be punished for dodging que

I declared I was going to go jungle, and during the banning phase I almost banned the champion our support wanted to play. I didn't, but the enemy team did, and he blamed me for it. So he changed his character and took smite, and said he was going jungle. He didnt listen to anything I said about choosing lanes and the fact that I was going jungle, so I chose a support character to play and took off smite. After I locked in (I was last pick), he threw off smite and said he was going support. I could not jungle the character I chose, so I simply dodged que instead of wasting my time struggling to jungle with this character, which I would not enjoy. The person who flipped roles around twice, confusing me and tricking me into playing a character I could not jungle with, gets no punishment for doing what he did, yet I have to wait 13 mins to play another game because some guy was being a troll. I deal with these people all the time and I feel that dodging que is simply the best way to deal with trolls, but why am I punished for it and not them? One of the reasons I left League for 2 years was because I hated the way Riot handled things. If someone curses and trash talks a troll their account gets banned, but the trolls and feeders who ruin the experience for those of us who want to win games get no punishment.