General Counterplay Overview
While no surefire way to counter killers, here a more serious approach to how to counter some of the killers that are often viewed as having no/little counter.
Deathslinger: Stealth is a good counter. He has little map mobility and pressure, but a smaller TR. Keep your eyes on your surroundings and dive behind cover when you spot him somewhere. When you are in a chase: Don't strife. He has a very small hitbox, so whether he's faking a shot or not, don't strife like you would against Huntress. If he's faking you make closing the distance easier, if he's not faking you make aiming easier.
Pig: 99 the gens and be patient. Whether in s swf or solo, try to 99 as many gens as possible and only pop them if no one has a trap on. if someone has, just go around bring gens back to 99 and see about doing totems and healing people.
spirit: very tricky, but she has counterplay in the form of stealth. she does need an overhaul, though, even if it's just barring her from stridor
Comments
Deathslinger you can spread out and hold W/break LoS as soon as you see him (or even better, spinechill goes off) and by the time he catches up with you, downs you and gets to the next gen 3 have popped. His mobility is crippling.