To fully appreciate the horror I'll give you a play by play of what I'm seeing:

0:00 - Mature Whips can't attack off of infestation (intended)
0:04 - Bombard blob clips model when attacked
0:15 - You can attack whips with mines
0:30 - 3 Whips guarding a resource tower do nothing
0:50 - Only 1 Whip needed to be killed to axe the node
1:14 - Whips can't deflect nades at close range
1:28 - Whips deflect grenade off wall back into themselves
1:58 - Whips fail to defend structures when not shot at directly
2:10 - A railing screws up the whip reflect
2:33 - Bombard inaccurate and has poor range
3:25 - Bombard too slow to hit moving marines
3:50 - Bombard is non-lethal
4:25 - Whip reflect finally kills me
5:05 - Whips use weak attack instead of bombard
5:30 - MAC briefly outhealing Whip's melee attack
6:28 - What the hell. . .
6:42 - Whips are moved, but bug out again