Well…quite often the actual diving boards are removed, so maybe look for just the platform part.
As for the slopes: Old pools look like that, they made them that way so you could touch the bottom. After whatever event the pool was built for (Senior Nationals, Jr. Nationals, NCAAs, Olympic Trials especially) the pool still could be used recreationally. Your average recreational swimmer would not appreciate 10ft depth all the way.
What is really cool is that some pools have bottoms that can move around. The depth can change as well as the angle of the slopes. If you wanna see a nice “fast” pool, check out the University of Indiana pool in Indianapolis.