is cover useless?

"Yeah I can see your terminator."
"what how?"
"I can see his face through this ruin through the window in that building and over those bushes"
"Jesus H Christ you cant be serious!"
"Yep I am and the rules say that I can shoot you"

That was the scene in one of my last games of 40k. Right before I had an entire squad of terminators wiped from a single demolisher shell. It looks like the overlords of 40k have decided that there is no such thing as cover in 40k. My squad had just deep stroked in and there was 2 ruined buildings and a modular piece of woods between them and the tank.
Well after I got down to a models eye view It appeared that he was right. In a shot that I compare to threading a needle with a howitzer. he rolled a hit and therefore I did not even get the cover save since the gurus at GW have decreed that the blast is coming from the center of the template. (that I was gleefully reminded of as the Imperial player rolled to wound)

This leaves me with one question. What has become of this game?

In a world where you have to have terrain consisting of six inch high walls to claim cover from or just accept that you can be blasted by any weapon the enemy has at any time regardless of how probable the shot may be. I just don't get it.
No wonder the guard is a top tier team. With unhindered lines of sight and weapons that have me taking my army off the board in hundred point chunks I can see that I will never have a chance of beating them in this version of the game. Unless I take the equally cheesy codexes and just appear right next to them with a melta gun or 3. (blood angels I'm looking at you)

Now not all cover is useless I understand. There is still those patches of bushes that my initiative 7 dark eldar arcon cant seem to untangle himself from until he gets beat on by a initiative 2 Necron warrior. (another real story from the front) and the single stick that if you hug it tight enough you get an amazing 50% chance of survival. But I digress.

I miss the old cover rules GW please for 40k MVI please bring them back, my chapter master is tired of me loosing the entire first company every time I take the field.