I made the same post a few days ago and got downvoted to hell.
I've played both Solo and DQ this year:
DQ - 60%+ winrate. We'd pick obnoxious CC combos like Sej/Illaoi/Nautilius/Anivia/MF/Yasuo and others 3-4 group ults going off at a time. No stopping that. Most of our games were won at champ select. We had no trolls, no reports and no AFK's because none of us do that. Pretty much a worry free winstreak.
Solo Q - 26% winrate. In the last 24 hours, I've taken part in FOUR 5,000-9,7000 gold lead throws. The last one was a joke as it was literally 3 on 2 on my team, with the two trolls constantly diving into 3 man groups and getting destroyed. My placements MMR also got changed from S2>B1 after my last two games features two trolls who fed on purpose for various reasons. Oh and so far, I'm 0-4 against 3+ person premades. It turns out that it's really hard for a solo player to beat the combo of Hecarim, Malzahar, Thresh and Gangplank. Who knew?