And at a time he even said, “I’m older than all of you so you should listen to me.” That was just the red flag.

That's a perfect red flag. There's always that biggie in class who feels he or she deserves to be worshipped by others simply because he happens to be the oldest.

One's age doesn't guarantee their sense of maturity. Rather it's the way they talk, act and react. Just the way they carry themselves.
Age is just a number but there's more to that number. It's also the measure of the length one has thrived to live on earth so I also believe there should be respect to that 🥲.