What is "Competative - Team League" all about?!

After being not satisfied about our “picks” because we went full Assasins because he Instapicks Malthael and after dying several times mr. “qazaq” says we are trolling and stays afk at base after joining again (we were better with bot) he decides to feed and evade afk kick saying “I don’t care and etc” suiciding again and again and again what is it all about why does such people are allowed to play ?! I don’t understand how the report system is working I was banned for toxicity for 2 weeks do such people get banns aswell because at least I am not trolling game I am awlays playing until the end! I have replay to upload aswell!

Its a true i play the same game ban for him.