Studies have shown that 29% of the 42 people who have died after catching the new delta strain had BOTH vaccinations. That figure had then risen to 43%, with 50 of the 117 deaths having both jabs. At least 60% had at least one dose.
The Guardian says "It could sound worrying that the majority of people dying in England with the now-dominant Delta (B.1.617.2) variant have been vaccinated. Does this mean the vaccines are ineffective? Far from it, it’s what we would expect from an effective but imperfect vaccine, a risk profile that varies hugely by age and the way the vaccines have been rolled out."
If most of the people dying are those that have been vaccinated, clearly the COVID-19 vaccinations aren't effective. You take the vaccination and all the risks that come alongside it, and you still aren't protected.