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Nvidia and Intel have both been proven to partake in anti-competitive practices.
Nvidia's PhysX physics libraries and "Made For Nvidia" partner programs are example of this.
If you're running a game using PhysX on AMD GPU's, the PhysX calculations get placed on the CPU which can degrade overall performance. Kind of underhanded IMO.
Then there's Nvidia and Linux: Nvidia refuses to open-source any of their driver components by claiming they are licensing them from someone else. Whereas the newest official Radeon drivers: AMDGPU-Pro, are open-source now.

Then there's Intel, who paid millions of dollars to OEM's like Dell/HP not to give much attention to their AMD-based products.

AMD on the other hand was approached by an Intel engineer with trade secrets, and told Intel about it rather than buying them.

What nvidia does with physx... As i see... Is just criminal... Same with Microsoft and DX... Not even compatible in every Windows platform... Intel nvidia and microsoft are enemies of the technology