I actually like it despite it having fortnite in it

No, but if they hated it merely because it has "Fortnite" in the title, that would be completely justified.

I like the video

I don't really know.

Some people do, I just know it. However, I feel like the majority of those who hate it hate it because it‘s a bad video to them. Hell, I feel like more people would hate it because of Jeffy than Fortnite. That being said, I do like the video (mostly for the second half)

There are definitely people who hate it simply for that.

Me personally, I didn't like the first half of the video not because of Fortnite itself, but because I found Jeffy's reactions to be rather cringy. However, the second half was pretty good and funny.

I do see some people hate it for more valid reasons, the part where Jeffy goes on a rampage in the house is where the video really shows it's points however with a rather intense battle scene.