This is more complicated than you can get into with a few comments but your basic assumptions are incorrect.

First you’re assuming there’s a linear relationship this is false. Also, X energy always moves from X to Y temperature, this is false. https://en.wikipedia.org/wiki/Specific_heat_capacity

Also it seems like energy reflected radiated should be a constant or even a direct function of temperature, this is also false.

Thermodynamics is complicated, but earth is more so because energy moves around quite a bit. Wind and ocean currents move enormous quantities of energy around.