This season had a harder reset than past because of the new dynamic que they put in. This means this season is virtually impossible to improve in rank from the previous season. Before it was possible under certain circumstances. Normally your trend before the placements (meaning how good/bad you were doing up to your placements like win streaks/lose streaks), the order in which you won the games (doesn't matter if you go 7/3 if you lost your first 3 and won the last 7), and your previous rank. First one is straight forward and essentially means don't dick around in preseason in ranked. Second means each game in the 10 placements has meaning. With each game having less meaning than the first. So overall means nothing in terms of placements. Last is straight forward its your rank from last season.
Next you are bronze 5. There is no bottom, no place to demote to. You could be the worst player and no amount of wins would overcome the deficit. To ad there isn't much of a difference between the bronze divisions. The only part thats different are the people who just don't understand the game in any capacity.