To the OP complaining about Sweden, I actually don't find the train service in Sweden so bad. Sure it's not on the same level as France and Germany, but the trip between Stockholm and Gothenburg is still fast enough even discounting the added time of getting into the center, parking etc. you have 3h for the train vs 5h by car. And the cost is ~30 euros. I also find the complaint about motion sickness funny, compared to planes and cars the Swedish trains are still very smooth.
The more rapid but shorter lateral movements on a plane does not trigger my motion sickness, and neither do turbulence. That could be a personal aspect. I have the same issue where if I am on a boat that goes up and down then I am usually fine, but not if the waves comes side to side.
Generally speaking, taking the train in France is a rather good experience. The trains are quiet and confortable, especially the high-speed ones but even regular trains are fine. Newer carriages have power outlets at the seats and are well ventilated.
The issues people here fear the most are strikes (which is the national sport, particularly in public transportation) and the creeping-up of prices, especially now that there won't be any more competition from planes.