you present a plot of all-cause mortality over a 50-year age difference over some time period. the young end of that group is least likely to be vaccinated, and least likely to die of any cause. the old end of the group is most likely to be vaccinated, and most likely to die of any cause.
see if you can connect the rest of the dots on your own. (hint: population-level statistics do not track individual outcomes)
Yes, there are flaws in the data related to age, but that is likely done on purpose by the organization to obscure data.
British mathematician Norman Fenton analyzed the ONS data and came to the conclusion that the data being released is inconclusive on whether the vaccine is beneficial or not, suggests manipulation, and has segments in his analysis showing that if the data on the older age groups are corrected it can suggest that the vaccine is harmful.
@14:55
"and that brings us on to this latest ons report so because this report is on deaths by vaccination status this should give us the necessary all-cause mortality comparisons between the vaccinated and the other vaccinated and hence enable us to determine whether the benefits of the vaccine outweigh the risks now previous versions of this report didn't provide the relevant age categorized data and that made it essentially impossible to draw any firm conclusions but as a result of our own freedom of information request and direct discussions with the authors of the report listed here the ons included some age categorized data in this latest version but the problem is that the age categorizations were 80 plus, 70-79, 60 to 69, and 10 to 59, and that younger age categorization was far too coarse"
The Office for National Statistics originally did not provide age categorized data at all to the public. The age data they did end up releasing, as result of a freedom of information request and prodding, shows a wide age group of 10-59, followed by 60-69, 70-79, and 80 plus. This is the available data. The inaccuracy of the first group is the purposely released data by the government.
When the data from the later age groups are similarly plotted it does suggest that the vaccine is beneficial and results in fewer deaths. However, Dr. Fenton ends up concluding at the end that when the data is corrected it shows that the vaccine is deadly and harmful shortly after taking it and after that there is no significant benefit:

@24:15
"so here's the non-covid mortality rate for the 70 to 79 age group and what you can see here is in the steady state the non-covid mortality rate is on average 40 higher in the unvaccinated when it should be the same or low so we can take information like that and compare it with historical life table mortality data to estimate the level of misclassification and when we apply those estimates to the data we get these adjusted plots and in this case the only unexplained observation now is this increased non-covid mortality in the vaccinated shortly after vaccination"
He concludes:

Other topics in the video:

@09:11
"the infection rate amongst the vaccinated is higher than the infection rate amongst the unvaccinated when you plot that you can see very clearly here that the vaccinated have a higher infection rate than the unvaccinated for each of the age groups from 30 onwards which seems to indicate that the vaccine has negative effectiveness"
Discussing a Pfizer study:

@12:00
"so what we're interested in is comparing all cause mortality and we'd expect to see this kind of scenario if the vaccine is effective problem is that we already know even from the Pfizer study although the numbers are very small that there isn't great evidence for benefits of vaccine in terms of or cause mortality so if you look at the number of deaths in the vaccine arm as opposed to the placebo arm it turned out that there are 21 deaths after six months in the vaccine arm compared to only 15 in the placebo arm which isn't of course statistically significant but nevertheless it's not what you would expect to hope to see if the vaccine was as effective as claimed and if covid was as dangerous as claimed"