Not going to deny it’s less easy that it used to be but SNCF desesperately needs to extract some values from their business customers. Apart from a couple of lines of which Paris-Marseille isn’t they are always losing money on trip.

Also if you struggle with SNCF Connect which is terrible my advise is to use Trainline instead. It’s not as good as it used to be when the French part was still CaptainTrain but it’s miles better than the SNCF app.