The difference in death rates between other island nations, Australia and New Zealand, for example, are miniscule compared to Britain. But of course those two countries shut down immediately, while Boris Johnson avoided meetings, and hoped the whole thing would just go away, which is his usual modus operandi, when anything a little difficult comes along. These two countries also have an aging populace, in fact which country doesn't?
If "everyone and their cat" knows about Thailand's supposedly underreported figures I suppose it is too much to ask for a reference to your wild accusations? Other than the opinions of people you hang out with in bars, obviously.
This side topic came up as part of the general conversation, but perhaps you don't follow things too well.
If you're so dissatisfied with the way Thailand does things, perhaps this country isn't for you?