"My train is even worse than your train!" and why that is quite tiring, especially from people from Great Britain

Yesterday I was looking at the ticket cost and regularity of service of the ex-Thalys, now Eurostar, Bruxelles - Paris service.In terms of the speed of the service and the quality of the infrastructure, this route is excellent - more than 90% of the trip is on high speed lines where 300km/h is possible, and the line is 100% electrified.But the problem is how often the trains go (not often enough), their capacity (many single rather than double units), and as a result the high cost of taking these trains. Despite taking 3x as long than the train, plenty of Flixbuses ply the Bruxelles - Paris route every day. All the numbers about this route from 2023 are here (and yesterday I concluded not much changed in the 3 years in between).What was one of the first replies?Someone living in the British Isles whingeing that getting from north to south Wales takes 4 hours on crap trains."Try Wales!" the person demands. Trust me, I was born in Newport. I have. But that is not quite the point.I was…