Entropy There's no 'magic' and expecting that there might be, so a solution will be presented to you on a plate, so to speak, could be a big part of your problem. No-one else is going to sort this out for you, you need to take responsibility, tackle it actively and persevere.
We all have different degrees of 'fullness', from 'not full but not particularly hungry', through 'just enough but feel there's space for something else later, IF I choose to have it', 'full, wouldn't want to go for a walk right now' to 'stuffed, couldn't eat another thing, verging on uncomfortable'. You need to learn to recognise which one and how often is 'right' for your body at a healthy weight and that is going to involve experiment, a bit of feeling hungry and putting up with it, and re-training your brain.
Exercise and type of food eaten have a big impact on hunger and perceptions of fullness. I'm sure you're aware of the dangers of 'up and down' sugary food and the benefits of slow-release low GI carbs, with plenty of protein and a healthy level of fat.
Exercise makes you feel hungrier afterwards, (unless it's 'high intensity' e.g. marathon training, when it actually shuts down hunger for a while but catches up with you the next day) and this is where the conscious brain comes in - you know this, so you need to act rationally and eat no more after exercising than you would if you hadn't. It's easy to overestimate the number of calories you've burned and underestimate the number in your food. Don't.
Exercise can really help regulate your cycles of appetite though, when you're doing it regularly. Also, you can't exercise when eating or feeling full and you can time it so that you exercise at a time when you'd otherwise get peckish, so avoid snacking and save yourself for a sensible meal afterwards.
My other thought is, set out a plan for yourself and stick to it but don't obsess about it. Find something else to get engrossed in and focus attention on that instead. Thinking about food all the time does not help. I concluded, in one office I worked in, that there was an inverse relatonship between talking about dieting and actually losing weight. Some support can be helpful but people who are going to do it, do it, those who aren't chat.