If it isn't sustainable, don't bother with it.
Diets really far under maintenance do lead to weight loss but usually a lot of that weight is not weight you want to lose. I found that the best and most sustainable results came from a nutritional plan that didn't feel like a diet and so was easy to maintain. The first time i lost weight, i did it too quickly and though i ended up much, much lighter than i am now, i cannot say i looked any better than when i started - just smaller and skinny fat i suppose. The next time was gradual and consistent weight loss through a manageable calorie deficit and exercise and though i weighed probably about 10kg more than the first time - i looked much better and it was far easier with my appetite getting use to the new lifestyle.
What are your aims?
I would recommend recording EVERYTHING you eat through an app like MyFitnessPal. Sometimes something like this is enough to make people notice the excessive amount of calories they take when they don't need to from big binge dinners or over snacking. You may have to take the reigns on cooking in the evening if you think the dinners are what is defeating your diet. Figure out roughly what you think your maintenance calories are and then eat a bit under that amount consistently and results will come in no time.
I'm not in a dire situation weight wise, I weigh just over 13 and half stone at 5ft 10.. I'm carrying abit of timber all over. Long term goal is to get down to a comfortable waist size 34 and around 12 stone in weight... suppose just a slim build with some muscle definition.
I've no issue with cooking but sometimes it's not an option with my work as I can walk in a little late, so diet wise I'm looking for something my wife and daughter are happy to eat but could tweak myself so it ticks my boxes.. it's why I'm considering a low carb diet as I think a Keto diet may push me too far.
I've used MyFitnessPal before but I'll be honest I'm useless at logging what I have, I'll give it a serious go though.
Really do appreciate your advice.