These type of articles that do not breakdown the type of complaints are worthless.
The trend of increased complaints has been present for a few years now, but when broken down the increase comes vastly from infotainment and SW related issues.
And it is expected, SW complexity in the infotainment part has skyrocketed and automotive companies are in their core HW companies, not SW companies and are slow to adapt.
I wouldn't consider infotainment complaints to be a sign of drop in reliability.