I think if we take french cars (Renault/Peugeot/Citroen) in general, most major reliability issues have been on diesel cars exhaust gas recirculation systems due to strict european emissions and they are far from the only brands suffering from that.

German cars were known for their great reliability in the early 90's but in later decades had all sort of electronical gremlins.

Also I think regardless of their actual current reliability, some brands or models attract on average different kind of owners which impact how actual services are followed, if the car is stored inside or outside, if the owner take care or not of warming up the engine in the morning or floor it while cold, and the general care they apply to it.

It was in the 2000s but not anymore.

If you go to eastern Europe, specially in the Balkans, you will see a lot of taxi drivers with Renault with milages over 500k km. They do hold the space with the usual Toyota Prius.

The current brands in the EU with bad reliability issues are Stellantis with infamous Puretech engine. And BMWs, not so much for the reliability aspect, but due to the stupidly high service costs.