The trick for me is to apply engineering to the kitchen. You can actually enjoy really elaborate meals if you simply make more each time and utilize pyrex+freezer. Why make only 6 servings of spaghetti when there's still 50% free space available in your instant pot? (that 'max fill' line is but a polite suggestion :D) Planning ahead, logistics, etc. can make all the difference in the world. Imagine spending one hour…
Alternatively, one can enjoy cooking and don't mind spending time in the kitchen. Freezing food degrades the taste imo. But in my country eating out is considered a luxury activity, homecooking is the norm (the Netherlands)
Cooking at home in a way that allowed me to cut down on my bread consumption, manage lactose intolerance without entirely losing cheese from my life, battle ARFID into insignificance and eat from fresh is a habit that has taken me well into mid-life to develop, but the benefits are obvious, because I am no longer skinny-and-fat-at-the-same-time.
Now if I only had a repertoire of more than about nine dishes. Going to have to read this book.