Hi we just had a 21 foot above ground pool installed. There is a slope, we have no idea what to do next. The installer has been less than helpful throughout process and we're at the point we just to rip it down and call it a day. We don't know if we need a french drain or not. Also if we do, I don't believe we can dig very deep as it's mostly rock. I've attached some pics for reference..if anyone has any thoughts or suggestions it would be greatly appreciated.