In the fast/normal speech, I can't hear "o melhor", just "melhor". So I heard "nos temos melhor". Ignoring that I didn't listen to the slow speech to check, I believe this is also a correct sentence, isn't it? is it "we have better"?
Nono, it’s just not there. I had to replay it and it was way too short to be perceptible; I’m a native speaker of English, but an indefinite article in English this short would be something I could never notice. Infer, sure, but not notice.