Thanks for sharing your experience.
Could you share which modes and region you normally play in, along with your approximate ping? It would also help to know whether the imbalance persists throughout the day or becomes more pronounced at certain times. I’ll pass your feedback about the matchmaking.
I play on US servers exclusively. Ping is usually between 15-60, depending on the time of day. I can say with complete certainty that the imbalance kicks up DRAMATICALLY during weekdays, notably Monday, Tuesday, Wednesday, and sometimes Thursday. There are still far more games that are imbalanced on weekends than not, but during weekdays I get exclusively total stomps to a near unplayable degree, with maybe 1-2 "fair" matches for every 30 stomps. I typically play from 3pm to 1am, but I also play during mornings when I am free and time of day doesn't seem to have much impact- though I would say it might be more pronounced during mid day.