Banned Time

So here is my story. I was playing blind pick and I had to leave, I couldn't stay. So I get banned and I need to wait 20 minutes before every match. First of all I hate that it's 20 minutes, either decrease to maybe 5-10 min or remove it totally, I don't see use to it. Okay so what happened to me is I clicked queue and I waited 20 min, I was at 4 min left and I went to do something afk and I came back and I see I forgot to click accept and I clicked Queue again and I had to wait again 20 minutes. Again I clicked queue and I waited 20 minutes and I entered and picked champion and all. I was 100% the match will start, it was like at 10 seconds to start and I went to take something from my fridge. I came back and boom again someone left and I had to wait another 20 minutes. Literally what the fuck! Here I am again waiting 20 minutes as I'm writing this. I hate this system its stupid and not useful, even if i get banned, I leave games again because sometimes I really need to go. Only thing you're doing is removing my time from my real life by adding these 20 mintues of waiting, its boring af. Thanks :)