I tend to agree looking at your history.
What I’m seeing (and I’ve seen this on a few other profiles as well) is that you’re playing a lot of stronger opponents, which is great for getting better, but has resulted in a lot of consecutive losses. Glicko, for better and worse, tends to accelerate your rank change when you have a lot of consecutive wins or losses.
I’m going to have to think on this a bit. It’s come up a few times now and it’s a a very legitimate approach to getting better at the game so I don’t like that the system is punishing players who play a lot of stronger opponents.