Hi Alishia,
I don't know about anyone elses reply on here because I just don't bother reading them. But the best possible answer to why people are so mean is the environment we live in. You watch the news right? People are being killed, and usually in a senseless manner.
It is a real hostile & not-so-nice world our here. Most times the people in question were raised to be mean but not all turn out that way.
For me, and I will have to out my age I grew up in the 60's & 70's. The 60's were a real violent time and I was a young girl who just happened to hear about things I shouldn't have heard. Real brutal stuff. Along with being raised by a brute of a stepfather who was an ex Marine Seargent major who brow beat into me that the World is cruel & no one will show mercy. Among other negative mantra's. That's just one example for you. I know that for me I have a real hard time being nice or trusting anyone. I lost that sweet innocence since I was 8 years old.
I'm trying (yet again) to find someone to help me through all of this emotional torture I go through which is why I chose the moniker.
I don't have an answer you'll just have to try to find your own path in life.
As for what you said on Youtube about how not so nice the replies are. I'm guilty of that, however the reply I had left was for an interview I saw about one of the Manson family murderers who were trying to gain parole and OMG did I let loose on that one. I didn't hold back they are some evil animals those psycho's are. But that was the only time. Sometimes Youtube is a good place to vent!
Although I'm swear like a sailor I too want a nice world to live in. There really wasn't a time when this world we live in was ever nice and I know I've been around for a little while.
But keep optimistic will you? I'm counting on you! I hope to call on you to help me through.
I know I've rambled but this is how I feel. Its the best possible answer I could provide.
Take care