The Seychelles has less than 100k inhabitants, to get statistically significant data it's probably more useful to look towards other countries that have been vaccinating aggressively, like Israel and the GB.
Also, the Sinopharm vaccine is perhaps not so effective. I thought I had heard numbers like 50%, but a quick internet search says it's 79% effective. Still less than Pfizer.
I read that around 60% of the population is vaccinated, around 30% of those tested positive was vaccinated, around 20% of those in hospital was vaccinated and 0% of those that have died was vaccinated. Using those figures, the vaccine should be 50% effective against getting infected in the first place, 67% effective against getting badly ill, and 100% effective against death. Of course, those numbers are hardly statistically significant, but still ... the data as I read them does not support the claim "vaccines are crap", only "the sinopharm vaccine is not very efficient".
RE: Seychelles, the most-vaccinated place on Earth, is being overwhelmed by Covid-19