I need help with this

If you haven't seen the ressemblance, it's that they all have a D score rank (I did them when I only had 1*)

I've been going around and APing all Easy, Normal and Hard songs (sometimes Expert), but I get to these specific songs that have D score rank and I just freeze for like nostalgia or something (Since I can't really get D score ranks anymore because of how I'm trying to max all my cards and decorations)

So, I'm wondering wether I should or not erase this memories from the game or keep it as is.. Pretty baby-like of me- but I'm genuinely looking forward to what you guys have to say