In the interest of keeping score fairly -- I did my undergraduate work at Georgia State University, smack in the middle of John Lewis' district. I also lived on the eastern part of that district at one time. That part of Atlanta was, at that time, full of drugs and hookers and run-down storefronts. It was a fun place to be at the age I was in those days. There were empty warehouses for parties, and those run down storefronts could be hired cheaply enough that even young people could afford to open a punk-rock-themed coffee shop or whatever. On the other hand, it had a real crime rate. Atlanta was the murder capital of America at points during those days. But I was young enough that this only added to the sense of adventure.
The intervening twenty-plus years have seen an ongoing expansion of Atlanta's wealth, and that district is not the crime-and-violence haven that it used to be. First, the Atlanta police turned an abandoned factory into a major precinct headquarters right at the center of the drug-and-prostitution trade. That dried up very soon afterwards. Then, all that money coming into Atlanta felt safe expanding into the area.
Today the eastern area is full of stores like Whole Foods. A lot of the fun aspects of the place are gone. They were replaced by less crime, more green space, and upscale shopping. There remain some nasty areas, in a kind of ring between the true downtown (where Georgia State is) and the nicer areas in the east and west. The district compares favorably on some measures with Georgia or America as a whole, and unfavorably on others.
Insofar as it's proper to judge John Lewis' performance in Congress by his district, I think it must be said to have improved during his tenure. I'm not sure that it is all that proper to do so: these are mostly state and local duties, not Federal concerns. But if that's the conversation we're going to have, it's poor grounds for criticism of the gentleman from Georgia.