There is no kicking in Cod. You lost connection to the lobby.
You can get kicked by the server if --> game starts and you remain in spectator mode too long - but you are given ample time to enter the battlefield..
Sometimes the lobbies get rearranged and you end up in an empty one without any type of warning. If that's hte case, it's normal.
Beside that, like FalconR6 said: there is no kicking other than being AFK for 2~3 minutes in select loadout screen after the game started.
If you had no "kick" message at all, was either a connection issue or a lobby rearrangement. And even sometimes internet issues can kick you out with message included and you can continue playing, your connection probably just derped.
Feel free to post your very nice message tho, it's good to let it out, ^_^