Unfortunately there is no easy answer for you. As you note, the US is now treating transit passengers as if they are entering the country, and nothing has been done to address the extreme incompetence and ignorance amongst CBP officers. On top of that, the agency is rife with racists, and most of them will automatically assume a brown-skinned Filipino is a criminal.

You must answer all of their questions truthfully, but do not under any circumstances volunteer a single piece of information beyond the answer to the question. They will undoubtedly attempt to trick you into saying something that can be used to suggest that you plan to stay, or that you did something (e.g., were employed) during a previous visit. If they ask leading or open-ended questions about working, do not take the bait, but rather restrict your answers to brief affirmations that you plan to respect the limits of your visa. They are very slippery -- they will ask things like "what are you planning to do while you are here?" Most people make the mistake of trying to be "co-operative" in the mistaken belief this will expedite their entry, so they may start giving details about their planned activities. Do not. Just say something vague and pleasant -- "relax, have a nice time". Remember that 99% of entry denials are because of information the passenger themself provided (e.g., a friend of mine stupidly admitted to volunteering in a soup kitchen in New York one day on a previous trip -- "AHA! So you were WORKING on a tourist visa! Entry denied!"). Answer all their questions but make sure your answers contain as little actual information as possible -- it's hard to give specific advice here, you really need to understand how they think (I am of course using the word "think" in its broadest, most general sense here) and operate, and stay aware that their questions are designed to trick you into make an "incriminating" statement.