You are really hung up on these extreme temperatures. This has been an exceptionally un-extreme temperature winter in both directions.
Just 1 day has reached the 60s from December-today. Likely we won’t reach 60 before February ends. There are only 8 seasons where Dec.-Feb. did not reach 60 at all (1878-1879, 1925-1926, 1935-1936, 1963-1964, 1969-1970, 1981-1982, 1986-1987 and 2009-2010). That kind of shows how anomalous only one 60 degree days is in those three months (and it was a low 60s day).
You are very stuck on the lack of extreme cold, which itself is odd, but you are missing the lack of extreme warmth also. It is just a weirdly average winter temperature season.