1. People never see the full scope of the Boldin trade. Boldin was the underneath chain mover. The Ravens traded him knowing (without foresight) that Pitta could take over that job. They knew (without foresight) that Torrey AND Jacoby could handle the outside. Then Pitta fractured his hip in the offseason. Jacoby got hurt week one. Even the backups we had at the time like Deonte Thompson got hurt (not that he was worth counting on though). THEN the o-line and the run game dropped off into oblivion. So whereas the short-sighted can say "see what happened without Boldin", others can see that a whole lot went wrong on that offense
2. Nobody pays a 3rd down pass rusher 7.5M a year to sit on the bench for 1/3 of the snaps or as insurance for an injury. Suggs and Dumervil stay healthy and half the fanbase is complaining about all that money to a situational pass rusher. Keep in mind Suggs and Doom have 24 combined NFL seasons and they only played less than 14 games in a season a combined 5 times.
3. No they didn't only extend Joe and Suggs. You're apparently forgetting Jimmy, Monroe, Yanda, Pitta, S.Smith, D.Smith, Dumervil, Weddle, Wallace, Watson, Tucker, Forsett, and others that have been extended or signed in FAs. For Seattle, they were signing a ton of guys on rookie deals to extensions. That's MUCH easier and cheaper than re-signing a guy on the end of "2nd contract". The Ravens also can't help that some of the guys they counted when they were extended/signed in FA to get injured and simply eat up cap (Pitta, Monroe, Watson, etc). Hindsight is clearly your primary ammo here but but with that you might as well blame Ozzie for not drafting Brady, Sherman, A.Brown, etc also