Yes, I agree,because you will

have to ask your current boss to sign your recommendation letter, you will have to ask another at least 5 guys to surpport you.

you know, it will take you at least 3-6 months to file your I-140 even helped by the lawyer. It is not easy to file your whole I-140 package in such a short time.

I strongly support your finding new job ASAP regardless of how hard it is.