1. Develop a "I'm better than you" attitude towards overweight people. In the woke age of "no body shaming ever", a lot of external motivation (i.e. fat jokes) has gone away. But for me, it was exactly those fat jokes or remarks about being chubby that finally put me over the edge of doing something about my weight. Let's face it, nobody actually thinks that being overweight is OK. It's merely tolerated, but thin people judge you for it. I know, because I was judged when I was at 85kg and I am judging overweight people now as I'm not one of them anymore. You're simply lesser than me, no matter how much you make, what car you drive, or how beautiful your girlfriend may be. Because deep down I know you're still not happy until you are thin, which for some reason is a higher mental hurdle for you than getting and keeping a high-6-figure job. You're weak.
2. In the same vein as 1. but more specifically, I was always interested in street wear, and especially Japanese street wear brands. But the thing is, until you're rail thin (like a 20-something Japanese skater dude, for instance), those clothes will look bad and try-hard on you. Nowadays I don't wear street wear anymore but I still want to be able to tuck a dress shirt without showing "the bulge". Making clothes look good on myself was another huge motivating factor to lose weight.
How exactly you limit your calorie intake while starting to burn off more, i.e. the specific diet is the uninteresting part. You first need the mental framework that allows you to change your habits, and will keep you adamant in the hard times of resisting that will definitely come. You're already starting to realize that, using the nickname "fatmoron" which hints at a healthy self-hatred caused by your current weight. Keep on in that spirit and soon you'll be the one who judges, not the one who's being judged.