Placement - Considering Quitting

So I've been playing League of Legends on and off since Beta. Last season or pre-season more so I guess, I made it back upto Silver V after years of elo hell and less than enjoyable ranked play to say the least. After even getting towards the higher Bronzes or low Silver I was motivated due to progress to play more and even because while it was marginal ranked play was more enjoyable, less "top or feed" or troll players. So I went 9-1 in placement and ended up in Bronze IV. I don't think I was lower than Bronze III all last season and even made it as high as Silver IV, being in Silver V directly prior to placements. How does this work? I'd at least like a valid explanation on the placement system. Either way it's pretty demotivating.
Report as:
Offensive Spam Harassment Incorrect Board