As a sometimes complainer, let me add my thoughts...
1) Mauer's contract, don't think I have ever really complained about it. The Twins were in a no-win situation at the time they signed him. He was coming off an MVP season, was a hometown guy, and they were a year away from opening a publicly financed stadium. They could either bite the bullet and over pay, or risk losing him and dealing with tremendous public backlash. I also think he's more valuable than people give credit for. There just aren't that many Catchers in the league that provide offensive value. I do think the Twins ownership could have been wiser, and treated the contract as a special deal and excluded it from the team budget, since so much of it's value was based upon "goodwill". We've seen other teams do this from time to time for special players, and let's be honest, it's not like the Pohlad's can't afford a little goodwill, in more ways than one.
2) I do complain about the publicly financed stadium, but only in the realm that the owner's indicated that without it we couldn't compete financially, and now it seems that with it, we still can't compete financially. Even though Twins fans have been good customers and bought tickets, paid for concessions etc. I think it was a cold slap in the face for the team to cut payroll by almost 15% this year.
3) I really haven't seen much complaining about Mourneau's toughness. I've seen plenty about Mauer, but most just want Mourneau to get better and hopefully contribute again. I think you're stretching for a #3 on this one.