I think there's a third option - perhaps it is in your best interest to work elsewhere. Somewhere with a CTO / team lead who accepts your skill level as junior where you can grow without your job being on the line.
I personally would feel very pressured and don't know how much I could focus and be happy if I were in your situation. Perhaps you are not bothered by it at all, in which case I don't think my advice fits you very well. But consider it.
I personally would feel very pressured and don't know how much I could focus and be happy if I were in your situation. Perhaps you are not bothered by it at all, in which case I don't think my advice fits you very well. But consider it.