Sorry. I didn't bother to check the dates on some of those pics. The ones from 2012 look great
Welcome. But the crocheting is going to really destroy those nice locks. I can see your scalp in some of your pics. That's a bad sign. It's called traction alopecia and will eventually lead to baldness. All it does is break hairs into smaller and smaller pieces. They will become too weak to hold their own weight and probably start to snap off in places.
Also, I can see in a few places that something was tied relatively tight around one of your locks. That caused a couple of weak spots that if left like that might start to keep thinning and thinning until they are only held on by a few hair until it breaks