The solution is not voting with your wallet, but either leveraging the DMA or drafting new laws that counter this.
Either Google should be forced to approve secure alternatives like GrapheneOS or companies should be required to also implement AOSP attestation. Or alternatively, remote attestation should be banned completely, but I can understand the argument that it serves some legitimate uses.
Vote with your vote for politicians for common sense regulations that favor the consumer at the expense of everything else.