There are some locations on the various canyons of Clairemont that can be pretty nice actually. View, nature, terrain, animals, etc.
Not sure if that is enough to prevent it from becoming a slum…
It’s really an interesting question, how neighborhoods evolve/devolve over time and why.
For example, USC was in a very nice neighborhood when it was founded. Mount St. Mary’s, just North, at that time was a haven of Vanderbilt’s, Carnegie’s, etc. There were the Rose Gardens. Some of those old homes remain and they are AMAZING.
Not sure what started the decline there. I’m sure the Coliseum and Sports Arena didn’t help, but the decay probably started much earlier. Maybe the freeways? Rich flight?