飞扬嗒兜兜
存在的通俗的表达可以是I'm not very good at taking photos, I'm sorry if the photo looks bad.比较正式的是I'm not a skilled photographer. Please forgive me if the picture I took doesn't meet your standard.
无敌小猪猪侠
基本都是“好看的”的反义词don't look greatnot good-lookinglook unattractive/unappealing/unlovelyugly