The best I've ever felt was keto, the easiest for me to adhere to was calorie tracking. It's marginally harder if you eat out a lot, but if you cook for yourself and can throw everything on a food scale for a week or so until you get an idea of what's servings of your most commonly-eaten foods looks like, tracking calories made losing weight for me and reducing my daily eating almost comically easy. There's a switch in my brain somewhere that works really well when I have to enter the calories of everything that goes in my mouth into an app....suddenly that cookie or those chips that were so hard to resist aren't a thing for me at all....my brain manages to yell "200 calories for THAT?? Nope." I found myself eating more at the end of the day just to hit my total calories and macros.