I'm not upset about trading Polanco. However, that trade would have made way more sense if the Twins had used his money to get a better bat to plug into the lineup every day. But they didn't, they signed Carlos Santana and traded for Manuel Margot who insanely they are OK paying 8M dollars. It was a lateral moves at best. As it is (particularly with Margot of all people the RH DH), I'd rather have just kept Polanco and maybe tried trading him again at the trade deadline.
I think the front office was too focused on getting something for Polanco AND getting rid of his salary and failed to see the urgency and big picture of EITHER getting a good player for Polanco OR getting rid of his salary. It took too long for them to understand they weren't getting the good player, and by the time they finally settled for the Mariners offer, the good free agents they could have used the money on signed elsewhere. With nobody good left to spend their scratch off winnings on, they said "Screw it, we need to spend the rest of this somewhere."
Ownership handcuffed the front office this year, but the front office either panicked or tried to get too cute with it. It's hard to see this as anything other than a failure. I'm not going to crucify them for it, they've done better in past years and this isn't their epitaph, but it still was a chain reaction of poor choices and I think it's OK for the fans to acknowledge that.