They are awful because they are never on time. Your post is pure delusion. I feel insulted by you even implying I could half agree.

> why do you think even the SNCF when they moved their office to saint denis wanted to have a specific arrival gate for their employees-only before backtracking when someone smarter than the average told them it would send the wrong message?

You are unlucky. I was working as a contractor for SNCF at the time of the move so I 100% know that what you are saying is pure bullshit. There never was a plan for a separate gare. The part of Saint Denis where SNCF is is perfectly safe anyway. I find it hilarious that you think it's even possible to open a new gare for a specific use case on the RER D, one of the busiest line in one of the busiest metro network.