Ranked

went through 3 lobbies, i didnt ban a champ once, then 2 more, (6th lobby within 20 minutes) was on youtube and missed picking my champ as i was first) and i got a 1/2 hr ban, whats up with that? I was trying to q up for a total of 20 minutes, and then i have to play on my smurf (we all have multiple accs due to idiot riot) this is my 4th smurf lol