Insecure about them simply being dreads or insecure comparing your dreads to other dreads?
Not that it really matters, it all boils down to embracing yourself.
Before I had dreads I was way more insecure than I am now. I'm still insecure but not about my hair! I wake up in the morning, look in the mirror, and see ME. The me I always wanted to be. The me that was inside wanting to break out. I take that feeling with me all day. Fuck the haters. They're the ones that made me insecure in the first place. I'm taking my thunder back!
One thing to remember. We all have opinions. We all have ideas on what we find aesthetically pleasing. The thing that divides nice people and assholes is whether and why those opinions are shared.
Why should I care if some middle aged, bleached blonde, botoxed, soccer mom driving a mini van and wearing crocs thinks my hair is gross? I think her choices are gross. I'm just nice enough not to say it to her or treat her any differently because of it.
Of course I do reserve the right to lay down the judgement if someone decides I need to hear their opinion. Tit for tat my friend.
And not that it matters in the slightest! but it is my opinion you should keep rocking those dreads.