You can't blame Paizo for not trusting WotC to never try something like this again, by some other tact. We all thought the OGL was iron-clad and look how that turned out.
Is there a person out there who believes they would be issuing new rulebooks now if that hadn't happened? I don't think that's credible.
As to the larger question, yeah man, WotC's track record the past couple of years in the D&D and MtG space has been...not good. They are a 8 + billion dollar corporation. They hold no altruistic values. They do not care about you. They will never love you. They will try to screw you over the instant it makes sense for them to do so (we have demonstrable evidence of this).
So like, you know, they gotta take their lumps. I would say the pre-ponderance of the "hate" you're seeing is more of a result of Wizard's superpower. Which is, to point a gun at their foot and pull the trigger every couple of months, which then accordingly generates a reaction. The best way to stop the "negativity" would be for them to stop messing up all the time. The onus is on them, not us. Tread on those who tread on you and all that.