Oh neither am I. I even accepted Gus and his horrible accent from Breaking Bad. But if you try to go for a truthful show, why not hire Colombian actors? There are 47 million Colombians. Surely they have a couple of good actors?
As a non-Colombian, and a person who has a basic/ intermediate knowledge of Spanish (so I can't complain about his accent), I think Moura did a great job.
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