>>3701286EDs are usually way more relaxed than OPs, they're a different beast entirely I'd say. The OP is here to tell you what the fuck is going on and to grab your attention.
I mean like what do we have, GaoGaiGar starts with just GA GA GA GA GA GA GAO GAI GAR, which gives you a very good idea of what you're gonna get: screaming and excitement.
The first Symphogear OP starts with "Listen to my song", and the MCs are singing probably like a third of the show.
Luluco's OP is goofy as fuck.
EDs can just kind of do whatever they want, they're usually pretty relaxed as a kind of "hey the show's over" I guess.
I'm probably full of shit, but whatever that was fun to write.
Eitherway the style of OPs and EDs are usually pretty different, so I'm not sure it's entirely fair to say that they're better, more that that's just you thing. But people say better when they mean they prefer all the time anyway, so who cares.