As for what you can do about this while still making reaction videos - I actually have a good answer here. You can do what I used to do when I was a music reviewer in college.
You can cheat 
Back then I hated music critics that would tear down artists due to their own biases. So I decided to use my own biases for good.
I would sift through and select new bands that I actually liked and only review them.
It’s kind of cheating but my editors never caught on and as such I was able to help promote bands I thought were talented while hopefully introducing people to new music they liked. And it left room for constructive criticism and comparison that the bands themselves appreciated from time to time. One band even picked up some of my feedback and incorporated it in to their press kit, it was kind of cool.
This was much more satisfying than the usual path critics take and even if I was technically not doing my job at face value, it felt like I was doing something better.
So, cheat! Do reactions to stuff you really have insight into and which contain concepts you want to introduce other people to.