All off those are problems on your end. When you fly in for a really long time, there is two options: ether your consol is having hard time getting the right information from your hard-drive or your connection is slow at that moment and you are having trouble establishing solid connection to the host. When you load into a black screen it usually means that you are being re-connected. And the lag is caused by your or the hosts connection. ( Destiny is a peer2peer game and doesn't use servers for hosting pvp or pve)