No problem, I've been playing TT off and on for about the last 2 years, but I'm by no means an expert :P
Oh man, don't get me started on 3v3 matchmaking, lol, I'm Gold and I've been on silver teams going against plat teams with Diamond players on TT, it's a bit ridiculous. Seriously though, how I've come to understand the inherently flawed matchmaking is due to a much smaller matchmaking base, as in there are simply less people to pick from when pairing you against opponents, which means a much higher range of possible ranks to go up against compared to SR.
As a kind of fun fact, before the per level change on Sunfires, 3 bruiser teams stacking them were quite common in mid-elo TT and was honestly quite ridiculous at times. That and Teemo, man were this TT+Dom specific changes to traps a relief.....