It's not necessarily any lack of quality here. Every different processor, CMOS driver, and chipset will radiate different amounts of RFI on different frequencies. Different cars will have the keyless locking, TPM, and such working on different frequencies too. it's impossible to design against or shield against every possible frequency at all power levels.
It's the combination of car and cam which is the problem. Others people use this exact same cam in other cars with no problems. You've found a cam that works with your car that gives no problems. The Blackvue 750 has caused similar problems in other cars. No car and no cam is immune here.
So there's no single-point problem and thus no single-point fix will work. Maybe somebody would like to create a database of cars and cams which give problems that people could research before purchasing a cam, but that would be a huge never-ending job. It's the only real solution I can see thart might work.