The TGV is one of the crappiest trains ever. It was made for businessmen/bureaucrats who travel with a satchel, they never realized that folks would actually go in it with suitcases since there is so little space to put them and they had to modify the inside of the trains after the fact to accommodate some space for it.

Also, they never considered that people with disabilities might want to board the train as you need to climb stairs even at the first level.

And let's not mention toilets are always broken and are washed like once a day or something which makes it look like you live in a developing country or something.

Compare that to the shinkansen in Japan and you are in for a good laugh.