Couple of things I want to bring around now that I've been consistently in the art community again. Last I was very active in it was in 2009ish. There were some things I saw back then that I hoped had gotten better with progress in society, but I see that is not the case. So...
Don't tell someone that they're not actually inspired by something that they just told you they're inspired by. If you look over someone's work and its missing a component of their inspiration, it doesn't mean they don't understand or are just a cheap imitation. They simply just may not have the experience yet to fully adapt the attributes of their inspiration. Telling them otherwise is just discouraging them. You can of course tell them what they are missing, but to tell them "you're wrong, you're not inspired by this" is just a stupid take.
When you are criticizing someone's work, remember there is a person on the other side of that artwork. Do not go on a tirade against them because you don't think their work is good enough. Don't make assumptions about that person and don't make it personal. You can be highly critical without needing to go on attack mode. As helpful as you may think you are being, you are definitely discouraging the person. And you are also most definitely hurting yourself, because they will NOT forget who you are and the things you said.