I always preach that if you've given a channel what you feel is a reasonable amount of time and it hasn't grown the way you think it should have, that you should consider starting over with a new channel. There is no shame in it whatsoever. It doesn't mean you failed...it just means you recognize that your current idea isn't exactly what people want and are willing to make changes and start over in order to try to achieve success. There's nothing wrong with that. Let me show you an excerpt from the wikipedia page of a YT channel called 'Cinemasins' -( - 4.5 million subs and over 800 million views):
In December 11, 2012, after a few unsuccessful channel attempts, they released "Everything Wrong With In 2 Minutes Or Less," which garnered over 250,000 views in the first week partly due to a post.
Notice anything interesting in there? That group of guys had 'a few' unsuccessful channel attempts before they found the right idea and found success. Had they continued trying to make their original ideas work they likely would never had been as successful as they are now.
I'm not trying to discourage you...don't think that I am. I'm just telling you that it's okay to scrap one idea and start over. It can even be fun. It can give you renewed hope and be a powerful motivator to come up with interesting ideas and to produce compelling and quality content. On the other hand, you don't have to scrap anything to start over. You can always continue your current channel and start a second channel at the same time with a completely different scope/theme and see if it catches on a little better.
Your dreams are your dreams. If your dream is to make it big on YT one day, then do not listen to those who tell you that it's too hard or you have to get too lucky, or that you should just do it for fun. We only get to live one life. No one will ever say 'I can't believe he scrapped a channel with 120 subs to try to make it big with a new channel'.
Good luck.