what's going on??

my last game i was booted from my group and champ select to the main menu when the timer hit 00 for the game to start had to restart the server to get back into the game even then it took a long while to get back into the game.... after that in draft pick i could not select a role an error kept occurring till i got a message saying something went wrong and i was disconnected from the server... why are these things happening???