That's too lossy, and "despidiose" is trying too hard.
> is trying too hard
Maybe, but still a valid pronominal verb.
Does this not lack the 'before then' nuance ?
“Despidióse excesivamente antes”?
It doesn't. "Despidió" is already past tense. That said, "despidiose", while valid, is quite archaic. If it was me, I'd say "se despidió demasiado" or even "se despidió de más"
Edit: Reading the meaning of the song, I'd say "dijo adios demasiadas veces", as it stays closer to the original meaning.