Deadlock

They are strong ults but I feel like there's a fair amount of counter play. Besides knockdown there's items like curse, rescue beam, unstoppable, indomitable.

Like the other comment mentioned, a lot of characters ults or skills can interrupt if timed right. Saving Paige ult to interrupt a black hole and heal your team is extremely satisfying.

If you know their ult is up, do your best to position strategically outside the range. Against Seven, know where the closest cover or veil is and be ready to pivot and change course if you think he'll use it.