How come llama2 70B is so much worse than many other code-llama 34B?

I’m not talking specifically for coding questions but the 70B seems utterly stupid… repeats nonsense patterns, starts talking of unrelated stuff and sometimes get stuck in a loop of repeating the same word. Seems utter garbage and I downloaded the official model from the meta HF.

Has anyone experienced the same? Am I doing something wrong with the 70B model?