I sympathize with you. However, I listen to a lot of solo artists in the classical field and even when singing music from composers like Bach, Handel, Mozart and Beethoven soloists “add their stamp” to them. I’ll agree, though, that when singing the National Anthem some of them twist it almost beyond recognition.
Most songs lend themselves to people trying to put their own signature on it.
But I think our National Anthem should be sung as written. Singers can add some emotion, but all the extras just detract from it.
just my opinion