Currently for the campaign where you need to get 15 s-ranks in mining base 3: Despair is just not fun to do.
Every once in a while it's fun to do, but doing it multiple times a day really wears on you, since it takes around 20 minutes to do. It isn't even challenging after the first couple of times since you will roughly know where everything is going to spawn and unless you somehow end up with multiple people that are either afk or new to the map (the latter being easy enough to help with a few pointers during the teleporter sequence) you're unlikely to lose a single base.
One of the worst parts about this campaign is that there is no indicator to let you know that you got enough s-ranks, in case you weren't keeping track.
Anyways, the point of me making this post is to please, PLEASE not do another campaign as monotonous as this one, otherwise a lot of people quite possibly are going to be burned out before PSO2 NG during this catchup process.