After owning my bike for 8 years and admittedly not always paying the most attention to it, I was thinking about buying a new bike soon. So I thought before buying the bike I'll see where damage is to my current bike so I can try and avoid damaging it the same way in the future.
A lot of videos I've watched online advise you to protect the toptube, downtube, chainstay etc. Looking at my bike though I have a lot of damage under the crankset and was wondering if this is a common thing? Is there something I could have done to prevent it etc. It looks really badly scratched up and I'm not sure what caused it so any ideas about that?