You want to leave a union of three other countries because of one section of a City, rather than work together with those other nations to make the union work?
Yeah, I see the difference. You blame the union for not getting what YOU want, when you don't realise that the Government we get is retrospective of the collective all 4 nations within the union. England does not have a Plaid Cymru or SNP equivalent. Our options are mainly Con, Lab and Lib Dem, same as you. You've chosen SNP, Wales PC. The North of England, feeling abandoned and rejected by those in Labour, have placed their vote elsewhere. Add in increasing voter apathy (around 33% of the voting nation) and are you surprised the Tories snuck in?
You've rejected the one party capable of keeping the Tories out of power for one not eligible for those in the rest of the union to vote for, becuase they are a single-issue party; independence for Scotland. We could reposition Westminster for Holyrood and the issues would be the same. Yet you don't seem to realise the problem is in part down to Scotland and Wales's voting habits as well. Tories will always vote Tory; if those who don't vote Tory decide to vote for multiple options what did you think was going to happen?