You don't seem to actually know the meaning of that word, "facts". I say that because nothing you written is, in fact, a fact. It's entirely subjective and simply you're opinion. Which should not be confused with actual facts. Actual facts would be something along lines of the last time Merc beat Hyundai in vehicle reliability was
2017 and it was close even then. Hyundai beat them in
2018, 2019, and
2020. So you have one brand that has steadily dropped, Merc. You have another that has steadily risen and surpassed the former. You don't have to rely on JD Power either. It's fairly consensus evidence.