expression
nostalgia filter; rose-tinted view of the past
Colloquial term for the tendency to remember past events more fondly than they were. Often used in online discussions about media, childhood memories, or personal experiences.
子供の頃のアニメを思い出補正で見てしまう。
I end up viewing the anime from my childhood through rose-tinted glasses.
あのゲームは思い出補正が強いから、今やるとがっかりするかも。
That game has a strong nostalgia filter, so you might be disappointed if you play it now.
Compound of 思い出 (memory) and 補正 (correction, adjustment). The term likely originated in online communities to describe the phenomenon of memories being 'corrected' to seem better over time.