Well the silver players went down to bronze unless they had really good mmr's, and the plats mostly went down to gold unless they had bad mmrs. Things are a little janky after the reset every year, it's just a bit delicate trying to ride your like-skilled people up through MMR at the same pace. Wait too long, and you'll be stuck with inferior teammates who are frustrating to play with, but climb too fast and you'll be up against particularly skilled people beyond your skill level and that could be frustrating too.
That said, you shouldn't fear high elo people as much as most people do. They're a good learning opportunity, and besides that they're not that much better than you in absolute terms. I recently had the experience of playing against not one but two challenger players and was pretty intimidated at first, but once the game got going they turned out not to be unstoppable gods (albeit pretty darn good), and it actually ended in victory. Some day you presumably want to be better, so you need to eventually get over your fear of higher elo players and eventually just view them as regular other players.