look at/see something through rose-coloured/rose-tinted glasses idiom (UK also look at/see something through rose-coloured/rose-tinted spectacles)
只看到事物好的方面;过于乐观地看待问题
to see only the pleasant things about a situation and not notice the things that are unpleasant
She's always looked at life through rose-tinted glasses. 她总是只看到生活顺心如意的一面。