Maybe towers aren't the issue..

So we had a pretty even game, and someone died around the 35 min mark. The enemies immediately went for baron since we couldn't contest, and then they literally just marched into our base because nothing could kill those overpowered minions. They can shoot the tower from outside its range, and they had a ww + ali + yasuo to immediately punish any person thinking of clearing the wave. Why are minions allowed to do this much damage, have this much health, this much range, and be that resistant? I'm all for being punished when minions push in your wave with your opponent, but it's either an issue with minions themselves or the baron buff.