My claims are true, Sweden has significantly tightened restrictions. And to add insult to injury, their death rate is appalling, so their policy was indeed wrong on top of not working.
They did not. If your standard for "going back on it" is "adding some restrictions", then you are erecting a straw man argument. By this standard, every country in Europe "had to go back on it", as all of them changed their tactics over time.
Also, not incidentally: I'm aware of no legitimate source for the claim that Sweden's hospitals were "full" (which is a non-specific claim). Most sources I've read emphasized that hospitals were under stress -- like in most parts of the Europe -- with some hospitals closer than others to capacity, and resources being shifted around the nation to manage:
Again, you could take this article and put it in Paris, Berlin, London, Brussels or other major cities in Europe in December of 2020. Details matter, and vague claims that "hospitals are full" are meaningless.
When their policy is "let's avoid any restrictions and just ask people to stay away from each other", and then they add light ( compared to other countries) restrictions, how is that not "going back [on their initial policy]"? No other European country persisted with the "no restrictions" policy post-spring 2020.
And i never said the Swedish hospital system was "full", just that their death toll compared to their neighbours was appalling, and said neighbors had to add restrictions on movement from Sweden.