I myself am main a titan. I love them to death. Sunbreaker is a class based all around it's super, and what perks in trees of the subclass can synergies with it. Here's a simple solution to counter HoS. Jump and keep yourself im the air, or run. Because the hammers have arc trajectories thus requires aiming and timing. If you go head on against HoS, of course you're going to lose. That's why you may think it's OP. Also, I've been countered by nove bombs, shadowshots, and fist of havocs. Theres are other supers that counter it, and in your case im assuming you didn't aim well with your super since you used a shotgun as well and still died. Im sorry crucible is not easy as it was in year 1, im sorry titans are no longer the bottom of the food chain, but adapt. Use what you have to your advantage, predict where enemies will be. That's how you can improve.