As someone who spends most of their time in plat, going up and down between plat 1-4 for the past few years, two things always made playing ranked very frustrating. One was sitting at 0 lp worried when you were going to demote. Two was getting to 100 lp and having to play a best of 3 to promote. I'm honestly not even upset when I drop below 0 lp and derank, because there's no anxiety tied to it. I know exactly when I will drop a rank and I know I can easily jump back up smoothly.
....
