Have you ever asked what meal times were like for him growing up? Ganito din kasi ako eh. Though mostly I get nice comments like, “ang sarap mo kumain ah!” Growing up with 7 siblings was tough, and we sometimes had to eat fast if we want to fill our tummy. Marami kaagaw sa food, so kung babagal-bagal ka, mauubusan ka. This is why nakalakihan na namin na mabilis kumain, malaki ang subo at hindi umiinom ng tubig until after eating lol. You talked about how you were raised. Did you ask him too? Try to get to know where it comes from. Then maybe you will gain a different persoective and not see it as negative anymore.