OP I am so sorry it sounds like you are feeling so down about this.
I am in a similar position to you in a lot of ways, mainly that I often felt hopeless and out of control of my own actions which tbh is the worst of all the feelings, but I think a lot of people who have struggled with their weight for a long time can relate - like, it's the thing we want most in the world yet we cannot seem to get it together and make it happen.
I wish I could say one single thing helped, but I'm starting to see that it probably takes an amalgamation of all of the information we have taken in over the years about dieting to find that right circumstance that kicks it all off.
I know that you are here for support and solidarity so I don't want to throw a load of advice at you, but I did want to say that as a fellow woman who has been obese since childhood (earliest weight I ever remember at around 12 years old was over 14 stone), I do feel like there is plenty of hope.
First of all I agree with everyone else saying you are worthy and valued regardless of your weight.
Being ashamed of yourself won't help anything. At the end of the day, humans are habitual creatures with a huge natural drive to seek satiety. Modern food has been scientifically designed to be extremely palatable and quick and easy to consume. Our body and brain's mechanisms around eating, hunger and fullness cues are then thrown massively out of whack by these blood sugar spiking foods, leaving us ever hungrier and craving ever more carbohydrates.
What I'm trying to say is, try and take the emotion out of the situation a bit. You are not obese because you are weak, or lack discipline, or are a shameful human being. You are living in a world that is literally designed to make you buy and eat as much food as possible, and some people through genetics or learned behaviours and habits are more susceptible to becoming overweight.
It feels absolutely impossible to cut these foods out at first, but changing your food environment and abstaining for at least a short while would really help get those cravings under control.
Don't do what I did and overlook the basic principles of weight loss because I thought the advice was too simple/obvious and I must need more help. Eat more fruit and vegetables that you like and get plenty of lean protein. Don't eat to little and accept that the first few weeks will not be an overnight change into eating well. You do not need to be perfect to lose weight, you just need to be reasonably consistent.
A couple of YouTubers really helped me see my weight issue without the veil of moralisation I had attached to it and myself. Kiana Docherty is one, particularly her videos which talk about the psychology and stages of change. Another one is Andrew Huberman, who does many in depth podcasts, one of which explained in detail all of the hormonal and neurobiological mechanisms of hunger and fullness.
The most important thing to have is self belief and to really get it into your head that no matter what you feel right now, you absolutely, 100% ARE capable of losing weight. You just need to give yourself the right tools to do so.
Best of luck and please do join in on the ongoing weight loss threads, I have found the support and community invaluable!