Is Overwatch worth it?

Yes and no.

What's good:

• General good game.
  
• Cool heroes, maps and overall cool graphics.
  
• Free updates (Maps, Skins etc)
  
• Events
  

What's bad:

• Rigged ranking system.
  
• Toxic community.
  
• Shitty metas.
  

Overall a really good and fun game, however the community currently destroys every aspect of it. If you're looking for a fair competitive game, stay away from it because that's definitely not what you get.
If you decide to play with your friends for fun, go for it.