Vast majority of his issues are resolved by proper strategy and runes/upgrades.
My favorite complaint is the comparison to Dungeon Keeper having an entrance: Bad news everyone, heroes didn't use one entrance in DK either. They busted through your wall, anywhere they can get to you.
The heroes will *always use the entrance* if you destroy the ladders. Every single time. With proper design you can completely prevent the ladders from ever being a problem with 1-2 patrolling units.
I've watched Total Biscuit's WTF's a lot, and while humorous, unfortunately they're usually about as accurate as the people who can't figure out basic game mechanics.