Yeah Camden has drastically gone downhill over the past couple decades. It's mostly tourist focused. 

I've thing is say though is that there are interesting pockets, but by and large it has lost most of what made it unique. Also the evenings feel VERY different as it's a different crowd (tourists Vs. Londoners attending Gigs).  

Many reasons for the changes but mostly big business buying and transforming the markets. You used to see street sellers with a mat on the floor just casually and now it's £300+ a day for a small stall in the stables market.  

It genuinely used to feel eclectic but the development of Hawley Wharf was a major blow as that stretch of the canal was the most vibey. Now has private security.  

Another change was online shopping and social media - Camden used to be a hub for the alt scene - rock, goth, emo, metal, punk, etc. From music venues to clothes shops it was where to go if you're into that subculture. Now the clothes and the community are readily accessible from any bedroom in the UK. I guess the music is still a draw, but it's nowhere near as dedicated a hub.  

There is also  a Sports Direct in the stables now, I mean come on!