I always had similar problems pre steroids use. I could easily cut back on carbs and calories but l'd lose mostly muscle, so I sort of decided I'd rather have the muscle and the fat. But when I started taking steroids I found I could cut back on the carbs and the calories and not just keep muscle and lose fat but gain muscle as well.
So when people say testosterone etc won't burn fat they're probably not wrong but if they say you can't cut fat and gain muscle then in my experience they would be wrong.
I'm guessing it's to do with the way your body makes better use of the calories it does get and especially the protein.
So I suppose my advice, bearing in mind your limited experience with test is to forget about peptides etc for now and try a slight calorie deficit while on cycle. I think you'll be pleasantly surprised.