It’s called ‘distance-lends-enchantment-to-the-view’ syndrome, fortunately it’s relatively harmless. It probably also manifests itself in you having lots of tartan things in your house to remind of the place you decided not to stay in. and on a day like today, you can say to yourself, “thank fcuk I left that cold, wet, dark sh1tehole of a place”.
For the record, delete 'the highs' and 'the joy'.