I agree that focusing in the number of cases today is a bad idea. Anyway, since the middle of May 2021 they are below the average of Europe https://ourworldindata.org/explorers/coronavirus-data-explor...

Edit: I just notice my link is for confirmed death, and you say confirmed cases https://ourworldindata.org/explorers/coronavirus-data-explor... Sweden is still above the average of Europe.

The problem is that I only look at the death number. It's too difficult to compare the number of cases, because there is a lot of asymptomatic cases, and very mild symptom cases and the detection depends how much each country is testing. Death are more difficult to hide.

Yes. You need to look at testing rates, and positive rates to have a meaningful comparison.

where is the mention of false positives with low quality commercial testing here ?

Any positive non-PCR test in the Nordic countries would be confirmed with a new PCR test before reaching the official statistics.