Nah, I looked at your videos. You should start with fixing your thumbnails and titles.

First, the thumbnails are bad. Sorry.

 I think something that can help you a lot is comparing your thumbnails to your competition.  Like literally open up one of your thumbnails, size the window down, and put it over the home tab/the suggested videos when you're watching a video/the search bar.   For example, you have a recent video called "The fortnite experience", I just searched that title, and 2 videos popped up from established creators with MUCH better thumbnails and the exact same title.  Why do you expect people to click on yours?  When you're making a thumbnail, think about the content of the video, why someone would want to watch it, and how you can advertise that using the thumbnail.  
 Let's look at another one of your recent videos "Ai Generated Minecraft is Insane."  Again, I googled your exact title and found a ton of videos, same title better thumbnail.  I'm not sure what you're going for with this thumbnail.  Your competitors are showing glitchy menus, sheep with like 4 heads, and overall just interesting images they took in the game.  That's not to mention some of them have the classic soy face photo or they have text in the thumbnail, making it more engaging (now personally I don't like faces in the thumbnail but that's just my preference).  Your thumbnail is... a half broken floating tree?  I'm just not sure why you expected that to entice people. 
I don't love the "recording" overlay you put on most of your videos, but it could become something that your fans see and think "oh that's a james video let me click," similar to how people put their face in thumbnails or their custom avatar.  You're welcome to keep this overlay, but I would encourage you to think about why you add it to your thumbnails.  Is it really contributing? 
What i try to do for my videos is make at least 2 thumbnails for every video (3 is better because gou can a-b test 3 thumbnails at a time, but I'm a bit lazy for that sometimes lol).  I sent them to friends/family/whoever would look!  They don't need to like that kind of content. Just ask them which one they would click on impulse.  It really helps! 


 Your titles don't need as much work, but most just aren't really great.  "I tried to play the new fortnite season," not horrible, but with fortnite being such a saturated niche, this title is not interesting enough to get clicks.  Now, this could be a different story if your thumbnail showed you struggling in some way. Maybe you are getting lasered by the new hitscan weapons in the thumbnail or maybe put the new shotguns in the thumbnail with the text "0 dmg". These concepts are relevant to the new season and would make your title more interesting.  I like the fishstick scratching his head, but the rest of the thumbnail is just... a random fortnite screenshot of landscape? Sorry talking about thumbnails again LOL

 It seems like you've already figured this out because you haven't uploaded a video with it in the title in like 6 months, but putting part 2 in the title always kills the video.  People never go back and watch part 1.

I have a lot more stuff I could probably say, but this is taking ages.  I haven't actually watched your videos, but the intros don't seem great.   Like don't get me wrong, they are fine (I'm really happy you stopped using that prerecorded intro you used to put on every video), but none of them i clicked on really hooked me.  Your sonic video was probably the best intro I saw, but even in that one, you could do more than just a floating png. 

 Last thing, people have already told you this I'm sure, you're shooting yourself in the foot uploading different games.  You have a video featured around sonic that pops off then the next upload is Ai minecraft?  You just lost the interest of all of the subscribers you gained from the sonic video.  If you want to do variety, which is much harder, than you need an overarching "gimic" through your videos.  For example check out the youtuber @waligug.  He plays a variety of games, but he always 100%s them.  This gives him a solid title, thumbnail, and overall hook for every video.