TH7 and TH8 from Champs get crushed quite a lot of times for 50+ trophies because they can be found by other similar THs (7 8 9) which are much below. So I'm not surprised you got -51 from a non-revenge :smirk:
Remember a TH7 with 3800ish cups posted his defense log showing he got in a row a -59 3*, a -39 2* and -19 1* aka all 57 to 59 trophy offrers (not revenges)
I'm not sure why you r trophy pushing in first place but if you are farming league bonus you should stay in Master
It's not something supercell can "fix" because it's how their matchmaking work

