To the PP asking why there isn't a UK team - national teams are based on countries and the UK is not a country. England, Scotland and Wales are countries within the UK state. Northern Ireland is treated as a country but I won't delve into the politics of that here.
There are only three countries in the world that do not have control of their own broadcasting - Scotland, Wales and Northern Ireland. Regional TV channels in some other countries have more control over their output than the miniscule broadcasting freedoms allowed in these three countries. This means that for most major broadcasts, we have no choice but to participate through the UK broadcaster which is understandably anglocentric.
In England you have no idea how it feels to have everything you view filtered through the lens of another country, or to rarely hear your own accent on TV unless its a token gesture, or for your country's news to always take second or third place. Imagine if you were in an alliance with the USA and all your news featured America first, read by Americans, most programming came from the US and all England could produce on the tiny budgets they were permitted was "local" drama, local newsrooms where the cardboard screens wobbled because they were so cheap, and your news was reduced to "man finds pie at bus stop" or a feature on the Norfolk Broads because only USA news was "real" news. Imagine if the only education news you heard was about US education, reducing your understanding of how your own system operated. That's about where we three countries are most of the time.
So back to football. It would be just sublime if the people of these three countries could watch a sporting competition through their own lens, hear what their own commentariat were thinking, considering their own prospects and perspectives, and not just hear England, England, England. We'd have our own hyperbole, not yours. If we thought England were shit, no-hopers, we'd be free to say so in a hopefully constructive manner, not excluded completely if our team didn't qualify, or have presenters from the other country being polite about your team's non-existent chances for 5 minutes just to prove they're not biased before returning to what they really want to talk about - their own country's team.
You won something once, 56 years ago and you've been living on the glory of it ever since. "Two world wars, one world cup". How old are these victories? And you didn't even achieve the first two alone but it's still a chant anyway. In 2022.
If you won something again, how much more would we have to endure? So no, let's dash that idea before you get anywhere near the prize, then we've only got the same old mindless crowing to continue enduring.
The current England Team do seem like far more decent young men than the swaggering egotists of old, but I'm afraid the broadcasting situation and the loudest elements of your fanbase means that we really need you out as quickly as possible. Either that or our own broadcasting which would leave you free to pontificate into your own echo chamber to your heart's desire, and we can provide our own coverage in whatever form that may take. I think you'd find a very different attitude then.
For the record, I don't feel the need to support other countries just because we're in a union with them. I didn't support all the EU teams when we were members and I feel no more inclined to support fellow UK members' teams. I support France after Scotland because they are our oldest allies and they gave my grandparents French citizenship as they did for all Scots until Westminster cancelled that arrangement without consultation. I also support the Netherlands as I have some ancestors from there. I have no reason to support England, but every reason to wish we didn't have to hear about them constantly whenever they think they might win something.