just wondering about how i should play ez if ap or ad and which is better

Both are amazing, it depends if your team needs a range AD carry (similiar like Corki) or your team needs a ranged bursty assassin mage (similiar like Katarina/Kassadian).

its a players perspective, some ppl find ap a lot stronger and do better in games while other like ad and do better in that feild

Either way, he's good harass early game. Late game is weaker then most AP/AD carries but he can still carry.

i wouldnt say he can carry, since ive been fed plenty of times with ezreal but late game, his damage just isnt enough