I just watched through the latest video on your channel, and I can at least offer up a few things I saw you could improve on that might help. First, I'd check your monetization settings and make sure you don't have "unskippable ads" on or something like that. A thirty second ad for a crappy movie that you can't skip will make a lot of people turn away pretty fast if they don't have adblock. I'm ASSUMING the box is checked because I refreshed about fifteen times and the same ad popped up every time. But if not it's just YouTube being YouTube.
Next, you might want to clip out the dead air in the video. Like there was one point where the camera stared at something (a sleeping bag? not familiar with Dying Light so I don't know) for nearly a full minute, just silence. Then there was a lot of trying to get on the same page with the person you were playing with. From what I could tell it was taken from a livestream, so stuff like that is understandable. I livestream for Minecraft so I know how that goes. Unfortunately people on YouTube are really picky and you have to deal with short attention spans. People will click off on something the second they get bored rather than stay and see the rest. Even if the rest is amazing.
If you're going to put livestream stuff up on your channel, I've learned it's better to clip it down to the best moments. Clip out the best, the most action-oriented, and the funniest, and put them together in a montage. If you cut out the dead air, stuff that doesn't move the video forward, you'll get more people. I've seen an improvement on my own channel by doing just that. My husband and I started working on our channel seriously a couple of months ago and we only just got to 29 subs this morning. It's definitely a slow burn, you just have to keep going. But if it's not making you happy, if you really want to quit, you shouldn't feel pressured into continuing. You can always come back to it sometime down the line if you really wanted to
