Placements

I was bronze 2 last season and didn't play much ranked. This season i wanted to climb and went 10-0 in placements. Even though i won every game I got placed in bronze 4. DO i really deserve bronze 4 even though i carried silvers for 10 games in a row? Please explain this to me.I was bronze 2 last season and didn't play much ranked. This season i wanted to climb and went 10-0 in placements. Even though i won every game I got placed in bronze 4. DO i really deserve bronze 4 even though i carried silvers for 10 games in a row? Please explain this to me.