I disagree entirely, Warwick is clearly overtuned in the current meta (where many games are decided early)
Forcing item buys on multiple opponents is huge. QSS on an ADC that could get last whisper to deal with your tank instead. Executioners instead of raw extra damage from giant Slayer, etc...
Then I want to point out that mikhael's (that support item you mentioned) doesnot remove suppression. So Warwick counters that item, not the other way around. While mikhael's is a great pickup against teams with heavy cc ranged engage (it would be great against Sejuani for example, if only my supports would buy it...) It's worthless against Warwick.
Finally, Warwick isn't really on a clock. He still has a very real presence late game. His huge damage reduction on a normal ability lets him tank absurd amounts of damage in the early part of a teamfight, while still doing big damage himself due to building offense. His ultimate is still a long range gap closer, even if enemies have QSS. His bite adds even more mobility.
Then his passive which guarantees he can clean up any survivors - no chance getting out from a lost fight with 3 survivors to defend until respawn, you're getting chased down for the ace.
Or how about the passive letting him see where enemies are? That pseudo vision is BS OP, especially late game when people don't have room for control wards. Having a trail pointing you to where a low health enemy is, is pretty nuts.