He - God. The poet reverentially suppresses the name of God when speaking of calamities inflicted.
by-word - (Deu 28:37; Psa 69:11). My awful punishment makes my name execrated everywhere, as if I must have been superlatively bad to have earned it.
aforetime ... tabret - as David was honored (1Sa 18:6). Rather from a different Hebrew root, “I am treated to my face as an object of disgust,” literally, “an object to be spit upon in the face” (Num 12:14). So Raca means (Mat 5:22) [Umbreit].