Sure. But, you can't ignore the SR because that is key to what has happened to your driver points.
You had a big drop in manner points, which has triggered a reset of your driver points to the upper limit of SR A (50k).
What that means in practice, is that if you can get your manner points up to SR S level (80+) while maintaining your driver points at 50k+, the game will allocate you DR S and SR S.
You won't see DR S in game unless your SR S.
However, what tends to happen for most people is - by the time you increase your manner points to a higher level, the driver points will likely decline. Don't let your manner points drop under 15 though, that will reset your driver points to a much, much lower level.