I don't think anyone who reads these reviews is actually looking for recommendations for something as well known as Undertale, so I'll just say this.
I will never take anyone seriously when they say something along the lines of "X game is good, but the fanbase ruins it". I believe anyone who uses this phrase should not be trusted when engaging in discussions as they most likely spend more time talking about video games then actually playing them. I held off playing Undertale for the longest time because of these people and I regret it.