You are really stretching the definition of a "blunder" on the vast majority of those.
Foligno was a blunder (one that Sakic was just as prepared to make if Foligno decided to go with Colorado instead of us mind you). If you really want to be picky, you can count Mrazek even though what he went through was out of nowhere given his history.
Another major blunder that you failed to recognize with Colorado: They can't draft for crap. Sure, they were able to get MacKinnon, Rantanen, Makar, and Byram... With 3 top 4 overall picks and a tenth overall pick in a stacked draft. Helleson and Barron were able to be used in trades, so not bad, and Newhook is also looking fine as a mid-first round guy. But given the amount of picks they had, especially early on when they were rebuilding, Sakic hasn't been able to develop anything internally and has whiffed on a ton of picks (Jost and Bleackley being the headliners, with Kaut possibly joining them unless he takes a massive step in the next few years).
They drafted Butcher, but he didn't even sign with them and he only really had one good year. The only guys they have really developed internally were either guys they traded for (like Compher and Girard) or guys they signed in UFA (Kerfoot and O'Connor)... And even those are far and few between.
Sakic's trading has just been good enough, and he has inherited enough high end assets, where his poor drafting record did not matter.