It would help if they released a table of data for this. Its states that the average 'reject' rate after four years is 5% of petrols, 11% of diesels, and 16% of EVs, but includes teslas with a 49% reject rate inside that category.
Without knowing the total number of failures for each make/model, it is very difficult to say that EVs in general are peforming worse, and not just being dragged down by the inclusion of swasticars.