You don’t need to apologise. The comment OP asked how Canada was doing, then the next commenter gave their opinion on the UK, not Canada.
It confused me as I read through the comment chain, as I was also expecting a comment on Canada (not UK).
It’s probably worth mentioning that the UK has a parliamentary system, not a presidential system. So the people elect a party, and the party leader then becomes prime minister (but the party can decide amongst itself who the next party leader should be, and this is usually done by a vote among party members).
Now there are legitimate criticisms of whether this is a democratic process, but the person who you replied to seemed to suggest that the recent change of prime ministers without elections was unusual and evidence of the UK “plummeting”. This user is entitled to his/her opinion, of course, but I just wanted to point out that this is actually constitutional and common practice in the UK.
“Far from being unusual, it’s actually the norm for Prime Ministers to enter office outside of a general election.”
Source: https://fullfact.org/news/unelected-prime-ministers-common-or-not/