A puppet UK under a collapsing and dangerous US
Answer: In football you've better chances to qualify and proceed with multiple teams, while in Olympics you gather more medals by sticking together.
UK has a long tradition of bad behavior and disrespect for rules based cooperation that started with the militant colonization of Ireland and the financial manipulation and colonizing of Scotland - resulting in an unconstitutional (and therefore unpredictable) chameleon called UK. And the Brexit cheat was all about being able to violate EU rules while still benefitting from EU by not accepting border controls neither on Ireland nor in the Irish sea.
UK's opium war druglord imperialism paved the way for that very Sinophobia we see today.
UK's lord Palmerston (1839): "The Chinese are uncivilized and the British must attack China to show up their superiority as well as to demonstrate what a civilized nation could do." Today US (+ its puppets) constitutes a global threat. US now ordered 600 more atomic bombs adding to the already biggest arsenal - and its UK puppet follows suit.
Btw, China just made a couple of new world record in nuclear fusion, quantum computing, privacy law, anti-desertification, anti-powerty etc. etc. - but somehow BBC managed to miss it - being busy instead inventing new smears against China while Chinese and "Chinese" looking people are the most harassed in UK and US.
And when China helps developing countries develope infrastucture etc. US is immediately there meddling and inciting and backed up by BBC. Latest example being a Cuba that hasn't been of any interest for BBC for decades but suddenly became super important when China tries to aid Cuba out of the misery the US has imposed on it.