I think it’s the old school way. I took a “Basic Web Design” class in high school so I could master the art of MySpace page customization and we were taught to use html tables for most layout/positioning that’s now down with CSS. Tables are so much easier to work with than flexbox and the result is pretty consistent across browsers and window sizes without having to fuss as much. Maybe I’m just cranky and old but flexbox is the worst.

Flexbox is pretty good when you use it for what it's designed for IMO. Maybe you'd find grid more useful for those use cases you dislike using flexbox.