People do have gains, I know I personally do not react to them particularly well but they do happen from time to time.
Try not to abandon the plan though, it is perseverance which is key here, even the founder of Slimming World (Margaret Miles Bramwell) says she would love to wave a magic wand and make people instantly lose the weight they want to however this is a longer-term healthy eating plan and not just a diet.
This healthy eating plan changes the way in which you think about food and prepares you for looking after yourself over time with a healthy, nutritious and balanced diet.
Nowadays, I do find myself thinking "this meal needs more super-free vegetables".
Don't deprive yourself, if before joining SW, you had a bar of chocolate every day, don't suddenly forbid yourself from having it. Your Synergy points (known as Syns) are there to allow you to have a little bit more bread, more cheese or even crisps and chocolate if that is your thing.
You need to be mindful about what you put into your body though, regain control and ask for things like Black coffee then add the milk you want to drink to it.
Taking a thermos to work is actually extremely handy, I used to do this every day. Then you have your favourite coffee, the right levels of milk/sugar sweetener etc.
Looking at your food diary, I was concerned about the amount you were eating against the activity you say you engage in. You need to eat more and the beauty of Slimming World is that you never need to go hungry, you can fill up on as much free and super-free food as you like and have your measured healthy extras and any Syns you may wish to spend.
To help you visualise getting your ratio of free to Super-free food, imagine a clock face on your chopping board or plate. From 12-o'clock to 4-o'clock, you need to be getting your super-free vegetables and fruit like peppers, cucumber, spinach, courgette etc. (if in doubt check your book)
The rest of the chopping board can be filled with conventional carbohydrates (rice, pasta), starchy vegetables like potatoes, lean meats such as trimmed pork, beef, chicken, fish and leguminous vegetables like beans, peas, chick-peas, lentils etc.
The key to cracking the food preparation is the above method, if you can stick to that most of the time, you're more than 75% of the way there.
If you are stuck for time, it may be worth doing batch-cooks at the weekend and then freezing things so you can take them out when needed.
Also, if there is a dish that you really enjoyed eating but feel you can't enjoy it because you are doing SW, there is probably a slimming world way of doing the meal, minimising the syns and it having a really nice taste, similar if not the same as what you used to have.
If you ever need support, this forum is a great place to start. In addition, if you go to group to weigh-in, you can get support by staying to image therapy sessions where you can get some time with your consultant or even speak to people who have been where you may be and have some great tips and advice for you.
Sorry for the wall of text here, I can relate to where you are as I have been there myself - don't give up!