IMHO, the Battle of Britain was a "Score Draw", but one that was far more advantageous to one side than the other
Danny , I think that comment sums it up fairly from both sides. Galland said almost the same, including to my father in the 50's before it became acceptable.
Often forgotten in the overall "Score" is the additional initial loss of R.A.F. aircraft on the ground on airfields ( an early Luftwaffe objective).
By later holding the Luftwaffe to a "draw" the U.K . objective was indeed achieved.
Whether Germany had already decided to hit Russia is a moot point to be argued by historians . The end result for the U.K. was the same , a turning point in the war
(A fact conveniently now obscured by those with other, "common cause", agendas.)