I ran into a guy this week who experienced a huge weight gain during the lockdowns. This man had a slight frame and went from 130-something to over 180 pounds. Packing on 50 pounds (roughly 40% of his initial bodyweight) during a 1-2 year period is quite alarming. He described his body as "looking like the letter D" and decided it was time for a change.
During this time, he visited Europe (I forget where to be exact) and came to the realization that food tastes better over there and as a result, he felt better. He decided he was going to come home and change his diet. The first thing he did was he went vegan. He saw a decrease in weight but didn't feel quite right. He introduced meat back into his diet and although it tasted great, it made his stomach feel awful. He came to realize that the vegan diet wasn't sustainable long term for him and the traditional diet he was eating was not going to improve his weight issue. So he thought about it and decided he would go vegan for a month, and then switch back to a more traditional diet and continue alternating back and forth each month. For him, this style of eating was something he could adhere to and his body responded well by dropping 20+ pounds.
The point of sharing this story is not to encourage a vegan diet, a meat diet, or any specific diet for that matter. The point is that whatever eating style you follow, be honest with yourself and make sure that it is one you can adhere to. When calorie consumption is relatively the same, there is not one diet that is superior to others. Most diets work if you actually follow the guidelines. What will make or break you is your ability to adhere to those guidelines.