One of the things about the Internet being around awhile is you can see what the world thought of Gordon Brown's approach back in 2008/9. That is, you can look at reports from around the world written in 2008/9 commenting on whether they believed Brown was doing the right thing. Not the revisionism of the more recent years, but what people actually thought at the time. Generally, they thought Brown was doing the right thing. For example, the IMF.

We can also see what the world thinks about how Boris Johnson is handling the current crisis, which, judging by the US employment figures just released, is going to be many times more significant. OK, this is a Guardian summary, but you can look at sources for both the 2008/9 timeframe and the current one from outside the UK and check for yourself.