That's a neat alternative universe that you're in. COVID is a complete disaster in the UK (and in plenty of other places, but the clusterfuck in the UK is really quite something), besides that brexit could very well cause the UK to cease to exist or be diminished, you can expect a breakaway effort to start in Scotland just about today.
Imagine the irony of the UK more or less trying to forbid the Scots from seceding the union when they just seceded themselves from the EU. That won't go down well, no matter what legalese the argument will be cast into.
I’m not saying the COVID situation went well by any stretch, but I haven’t spoken to anyone on the street who wants Boris out of office due to it. If a general election happened tomorrow I doubt he would have problems. It’s pretty clear most countries have struggled to handle it so that’s probably why Boris hasn’t had as much flack as expected.
Like I said, it’s unlikely that would be the reason he resigns, if that was the case he would have gone already.
Brexit will cause issues, but I don’t think many of them will happen in the next 12 months. The UK won’t “cease to exist” with the next few months let’s not be alarmist. (And I’m the one in an alternative universe?).
It’s more likely that Scotland will continue to ask for a referendum and Boris will continue to deny it.
Scotland will be disproportionally hurt by their lack of EU membership and voted strongly against leaving the EU.
As for people not wanting Johnson out of office due to COVID: we are in a similar situation here in NL, but at the end of the day results are what matter and Johnson has done the UK citizens absolutely no service with is performance so far. Maybe it will take some time before that sinks in and I don't have a shred of doubt that he will try to pin the blame on the EU for all of his own failures.
Imagine the irony of the UK more or less trying to forbid the Scots from seceding the union when they just seceded themselves from the EU. That won't go down well, no matter what legalese the argument will be cast into.