Of those, only Bennett is an outright awful pick; it's just sad that they've had 4 top 4 picks in 3 years and still can't sniff the playoffs.
Waiters is absolutely a terrible pick because of who they could've had instead in that position - and how he didn't even work out for anyone. Thompson is merely okay. Its not so much Kawhi as it is Val and their reasoning for it was beyond silly. Its not sad, its embarrassing.