The ranking's broken.. right?

I'm sure this is the way it's always been, I'm fairly new to LoL, but does anyone else think it's kind of bull crap that prelims for a new season have anything at all to do with your last season? It makes sense to me to just be a blank slate so you have a chance to start over in the latter, but it seems that everyone basically just went down a few tiers. Granted, going 6-4 ain't so hot, especially since I was B2 last season, but to be knocked down all the way to B5? I think I deserve to be placed at least a little higher than someone who went, say, 3-7. Plus, with all the silvers that got knocked down to bronze and the people who never made it out of Bronze 5 last season, there's a ginormous skill gap in Bronze right now, and it's making it impossible to climb. Almost every single game is a blow out whether it's in my favor or not. I'm more than sure I'd be able to hang with silver, but when my team's not working together and just running around not listening, (which is most of the time) there's really nothing I can do. If the ranking system really worked then every game would be a good/close game because you'd actually have players of the same skill level facing each other, but with this inconsistency and huge skill gap in bronze right I fear I'll never be able to crawl out of this hell hole. fml.