に of target (with stative predicate)
grammar34 sentences
The particle に marking the target of a stative predicate or stative-leaning verb — 結果に満足する ('be satisfied with the result'), 仕事に夢中になる ('absorbed in work'), 状況に慣れる ('get used to the situation'), 道具に使う ('use [something] for / on [a tool]'). Many Japanese stative verbs and adjectives that describe a mental orientation toward something take their object with に rather than を.