kitchen / Abbreviation of 厨人 (kuriyabito, “chef”).

immature / juvenile / childish / immature person / juvenile person / childish person / amateurish / inexperienced / unprofessional

as one wishes, in a way that one wants

(と〜) thinking that […] (with the next clause explaining that the truth is contrary to expectations)

in my opinion; I think; I guess; upon thought; upon reflection; upon contemplation / conceivably; presumably

to seem, to appear

continuative of the passive of 思う (omou); continuative of 思われる (omowareru)

(as と思われ) (2channel slang) Synonym of と思う (to omou)

(Internet slang) a “sickness” in teenagers characterized by sophomoric, edgy, and/or pretentious behavior (trying too hard to be special in unusual ways)

characterized by such behavior