There lies the problem: There is no control group in this particular "study" for a proper and reliable statistical analysis. A proper control group would match the demographics of the test group based upon age, gender, race/ethnicity, location (urban/suburban), occupation, health, etc. For example, if the people in the vaccinated group had more people with co-morbidities, more dangerous occupations, more illegal drug users, and/or drove more highway miles than the people in the unvaccinated group, then we should expect the vaccinated group to have a higher death rate than the unvaccinated group regardless of vaccination status. Unlike you, however, I have not drawn any conclusions -- one way or the other -- from the data in the article, because a statistically reliable conclusion cannot be drawn from the data. Seems to me that if anyone has "confirmation bias" it is you, my friend.
Somehow you do not seem familiar with the methods involved in statistical analysis. In this study we have two very large groups from the same society in the same age group. They were not picked “randomly” or picked to “match the demographics”; they were not “matched” in any way at all... They didn't need to be because they all come from the same group, people between the ages of 18 to 39 in the UK as a whole. By definition in statistical analysis none of your objections have any validity at all.
We of course all have our biases. And I am as likely as you to suffer from confirmation bias in any number of areas. In this instance I would prefer to think that those who chose not to be vaccinated did so because their decision was based some form of independent thought and analysis that they use to make good decisions that helps increase their longevity and has nothing to do with the vaccines. Sadly, this likely has nothing to do with it.
We have a statistical anomaly in the 18-39 age group in the UK that demonstrates that the people who chose to be vaccinated died in proportionally much larger numbers than their unvaccinated peers. The most likely and almost certain explanation is that the vaccines are killing large numbers of people through mechanisms that are becoming more and more obvious as time goes on.
Denying the validity of statistical analysis of the actual numbers and insisting that some imaginary study which would be a practical impossibility given the ever-evolving nature of the Covid virus would be more valid is nothing but a fool's errand. You can go on denying reality for as long as you would like if it makes you feel better for some reason. But it will not change a thing. The poorly tested gene therapy treatments that were foisted on an unsuspected public by those who raked in billions of dollars in profits which were generously shared with politicians and bureaucrats have been a crime against humanity.