Earlier quoted context omitted.
I've played fortnite on an off since there were seasons. I have no idea what the storyline is, there are some cut scenes when there is a new season but it make no sense. Claiming there is a storyline is a stretch, I think it is just cover for changing up the map/gear to keep it fresh.
I'll agree. My partner plays and I play a little. There seems to be a story but it matters little and doesn't seem to make sense (i guess the plot points that change the map matter)
The core plot is asking "Why are we stuck in this loop?" It does get convoluted, but it's there.
Various agencies are involved, the Zero Point (which causes the looping behavior) has manifested as many things over the seasons. Aliens and inter dimensional being seek after it.
Maybe you had to be there, but the first batch of seasons and even chapter 2 had many online theorizing and trying to guess what's next.
It's like a digital Lost.