Chiefs had interest in Peat

Well relatively speaking people saying he was garbage and probably not realistically he was mediocre, so I'd agree with you there.

We just paid him as if he's a perennial Pro Bowler. He only had 1 Pro Bowl worthy season, 2018.
Actually, he's at or around the average cash being thrown at FA tackles in 2020.

I'll even give myself some credit for saying, back when the team picked up his fifth year option, that $9m wouldn't look so bad compared to the free agent market for tackles.

But he's far from perfect and this may be another case of having to pay for what you can get.