> One good thing about the parliamentary system is that it’s easy to force the government to collapse so they’ll have to replace the Prime Minister. <
Yep. A “no confidence” vote will force a new UK election. But such votes only succeed when the government is a minority in a coalition. Labour has a huge majority in Parliament now. Unfortunately, they’re not going anywhere.
Oh, BTW, didn't the recent Conservative government go through like 5 different PMs?