At this point, after 900 videos, yeah, it's time to take a hard look at everything you're doing.
Age
One of the difficult things few people want to talk about is age. There is a certain type of content that appeals to a young audience. Once you cross an age threshold, your views will substantially drop off. If you're 30 years old or older, you're far better off making educational content.
I'm 47 years old, old and ugly. There is no way that I will ever compete with one of these blonde-headed, blue-eyed, 20 yr. old bikini babe fishing channels. However I'm a veteran fisherman with unique, fresh ideas on rustic forms of fishing. I spend most of my time experimenting with new ways to adapt seemingly different forms of fishing on a quest to find the simplest, most elegant form of fishing. I also spend lots of time teaching basic fishing tutorials. I also demonstrate my own methods of fishing with my own custom made fishing tackle. Tackle that people can't buy anywhere else in the world. That's where I've gotten a foothold.
Vlogs
Honestly vlogs ain't what they used to be. The novelty of watching someone else's life on screen doesn't have as much value for most people today. 10 years ago when people first started doing vlogs, it was exciting to see a normal everyday person, doing normal everyday things on screen. Today the novelty has worn off. In other words vlogs are not evergreen.
Personal Coaching
Honestly there comes a point in everyone's YouTube career to get some personal coaching. Someone like a Roberto Blake or one of these people who can look deeply into your analytics, take into consideration your skills and talents, dreams and passions, and form a plan to help you grow into the next phase of your career.