Square knots are easier because they're essentially the same knot you would get if you looped two ropes, and interlocked the loops. You're just creating the same knot with a single rope. Of course, a lot of people have trouble with it, at least at first, and end up with a granny (same thing as a square, except that one side is reversed).
Bowline knots are a little more complicated, and serve a different purpose. If I recall correctly the purpose is to create a loop that won't tighten no matter which way the rope is pulled. (?) They're harder for me to remember too. I remember using sheep shanks and half hitches to tie our canoe to our car. I think I could remember how to do that if I ever got another canoe. I miss canoeing.
_________________
I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...