Most of the people I've seen say "I'm never giving WotC a penny again" are not 3rd party publishers. From what I've seen on this site and others (Reddit and D&D Beyond), a lot of the people saying "I'm boycotting WotC forever" are people that already have a vendetta against WotC from some "sin" they committed a decade or two ago, or already weren't buying 5e stuff anymore. Definitely not all of the people, but from what I've seen, it's definitely a lot. And a lot of them are gloating about "how they told us so". That's immature.
And it's folly to trust a corporation. Corporations and other companies are not deserving of trust. They're not people and change whenever the leadership changes. Things changed for the worse, and they could change for the better. I don't "trust" corporations to do anything except try to make more money. Not defending their actions, but personifying corporations or having parasocial relationships with them is unhealthy. Boycott them to achieve something. The people on this site that already hated WotC because of 4e or Tasha's or whatever petty thing they did/published and are now gloating about it are acting immaturely and diverting the conversation away from what it should be about: how this could still impact 3rd party publishers and how to fix that/convince WotC to make even more changes to the planned OGL.
Blanket judging people is not associated with maturity, nor is making a whole bunch of additional assertions of their character and nature based on thin information. We are individuals, not some stereotypical hivemind Other.
I am a 4E fan. I was looking forward to OneD&D very, very much. While I was hoping to release some content for it as a fan, I was never going to make more than a few bucks on it and it wasn't a factor. But I do not like it when companies pull nonsense either, and I have historically responded by spending my money elsewhere. This is true for candy bars, books, video games, and housing.
You don't trust corporations, you trust or do not trust the people those corporations are composed of and are led by. Some people in charge of corporations are mostly okay. Some are much less so. WotC leadership - or whoever specifically is pushing the OGL - seems currently composed of people who are not acting in good faith, regardless of what happened two decades ago.
Per the parts that I have bolded, you seem to be
feeling things about this, and while it's okay to feel, I don't feel that it's super great to project your feelings at others in such a negative and accusatory way.