I was struggling with the exact same problem myself (similar situation, all meals catered + various snacks everywhere). Eventually, it was as simple as learnin

I was struggling with the exact same problem myself (similar situation, all meals catered + various snacks everywhere). Eventually, it was as simple as learning about the amount of calories I should be eating and keeping track of them. Perhaps the greatest difference was when I stopped pre-allocating calories the day ahead (like 400 breakfast, 600 lunch and so on) but I simply ate whenever I was feeling hungry. I prioritised foods which are filling but not calorie heavy (salad bar, lean proteins, yoghurts). This way, I was able to lose 25 pounds in roughly 3-4 months without much cognitive effort. An extra tip would be to also start exercising regularly, it makes a world of difference.