It is much more frequent, compared to how it was back on Voobly, that someone's rating fluctuates by upwards of 120+ ELO over a course of ~~10 games.
I have a similar run at this moment with a pretty long winning streak in 1v1s. I do not blame DE match making for this run. Ratings were pretty equal in most games. Same for skills. The skill of the enemy went up when my rating also went up. I felt lucky winning all games. Some games i really had to loose, but for some reason i was able to win in the end. Every match was much closer than my experience with matches on Voobly.
So maybe i became better? In before a free fall of 10 losses in a row 11