Just joined a postdoc and I already hate the lab and the research topics

So I recently just joined a postdoc after a struggle to find one! I came with a lot of knowledge and I am extremely hard working. I can perform experiments if needed until the job is done and everyone is happy. First of all, the job is payed very little - 1500 dollars a month in hand after taxes.. Literally less than a Walmart employee. Then, I started out following some suggestions from the head of the lab (who was SUPER excited about a technique), the same suggestion being given to me by Professor No 2 in the lab.. Followed the suggestion, performed the experiment (which was very very long and very very difficult) and in the end the head of lab calls me and tells me he does not like my partial results, that he is not convinced about my sample and I should perform this other experiment on this other machine, that I should borrow another sample from someone else (after he APPROVED my sample a week before, after all the inconsistencies I underlined the producing method has, the method being "perfected" by one of his PhDs, who is a chemist (I am a physicist)). Nobody ever told me in my 6 years of experience in academia that they do not like the images I am taking at the microscopes or that they don't like my results. NOBODY ever said that. I finished my PhD with flying colors and 7 published papers, my first postdoc with more flying colors and 2 published papers (it was just 10 months).. All my advisors were happy with me excepting this guy who is all over the god damn place. I feel depressed since I am payed SO little, the work is super hard to perform, I feel depressed and also caught between two stupid ideas from head of lab and No 2 as well. Should I put myself down or should I be kind to myself?