On one hand, I agree that these "dark patterns" undermine what legislators and voters want in terms of consumer protections and rights. Consumers and legislators need to be aware of it.
On the other, I think it leads to a banal conclusion. Legislation tried to achieve something by putting responsibilities/restrictions on corporations. It did not achieve its goals, because companies "implementing" the law have different things they want to achieve.
One common sense conclusion is "moral failings." I expect most journalists and legislators refering to this report will be in this category. Google is greedy. FB is cynical. Nowhere to go from here but moral righteousness.
Another common conclusion will be "loopholes." This will send us down the legislative rabbit Warren that financial regulation and tax law has been down.
The right (imo) conclusion is that the whole approach is wrong. We cannot rely on explicit (or even implicit) contracts between a website and every person who visits it.
There must be rules, not contracts. Where users need control or an agreement has to be made, these need to be baked into browsers, where the party implementing "user empowerment" are not the ones losing from it.
Moving to a world where an average consumer "signs" multiple agreements with companies per day.. that's not what our legal conventions were made for.