Why was it the worst place? Was it some bad experiences or sights?
I lived there from around 2002 to 2006 and I did like the UK: whether the party towns (great for a 20 year old) to the historical sights (much of London, then Edinburgh, Bristol, York, Canterbury, Durham etc. etc.) or the countryside (the seven sisters or the west country or the midlands).
Also have done a few shorter trips to the UK (mostly London, but also Sussex and Wales) since after Covid, and it’s been pretty nice as well - for me.
Could you describe the experiences you had?
Now, keep in mind I was there many times for work. Here are my complaints...hard to find quick tasty food...miserable weather, rude hotel staff, grumpy people, exhausted by having to look left while crossing roads as pedestrian, dirty streets, overpriced everything, too many foreigners, crowded, tiny hotel rooms, bad vibes. I liked walking in Hyde though.