I'm on 1200 calories a day and I am rarely hungry and YES, I sometimes DO have to force myself to eat because I top out at 900 or 1000. Also, I don't eat meat and I'm still very satisfied with my food intake. It's silly to make blanket statements that people are lying or mismeasuring or fooling themselves just because that isn't your OWN experience
Like kaplods said, it comes down to carbs for me. I cut out almost all grains and a lot of fruits and maintain around 150 or so net carbs a day. I aim for lots of protein and lots of fat. Eating a lunch of Greek yogurt with two strawberries cut up in it, a Wasa crispbread with peanut butter, and 1 oz of cheese (about 500 cals) keeps me fuller much longer than a plate of pasta. Not only fuller and more satisfied, but not even wanting to eat food just for the sake of eating food. That's been pretty key for me.
I would suggest cutting carbs way, way down, even things like whole grain crackers and watermelon which seem harmless enough, and focusing on avocados, nuts, cheese, Greek yogurt and cottage cheese, milk, seitan, tofu, tempeh, and, if you eat meat, fish/steak/chicken.
Also, I'll preempt a JohnP post suggesting intermittent fasting by advocating for it as well. Restricting eating to a narrower window of time often curbs appetites and reduces hunger, paradoxically. When I IF, I'm a bit hungry for an hour or so in the morning (nothing a cup of tea can't quell), then eat a large lunch, and have to remind myself to eat *something* for dinner to ensure I get proper nutrients. I have no trouble staying under my caloric intake and, again, paradoxically, never find myself unsatisfied after a meal.