You know how easily u can influence nide players and especially if a certain type of players are online so getting them to waste 3 maps is partly your fault, map CD is there for a reason and if you want to play a proper map there are a Ton of different maps that are off CD you could have chosen so i think you should have gotten a higher mute.
But yeah other then that i think you are right and life shouldnt have reacted the way he did to threaten you with an eban, i understand his reasoning (you wont enjoy the map with the eban as much as without it) but i think technically it would be abuse.
But in the end nothing happened so i dont think you should make such a Big Deal out of it.