From the IPCC report, 2/3rds of all global emissions are directly tied to consumption.

Well, yeah. Corporations aren't just nefarious evil entities, dumping carbon into the atmosphere for no reason. They're doing it to sell goods. The problem is that a lot of the environmental costs for the manufacture and transport of those goods are externalized and go unpaid.

It's difficult to put the blame for that on the consumer, who has no visibility into manufacturing or logistics, and who has vanishingly-small options for not participating. Buying domestic goods is very difficult or impossible, and goods which are manufactured in more environmentally-safe ways are significantly more expensive (because the costs I mentioned earlier weren't externalized).

If a consumer is presented with two options, one that costs $X and has unknown environmental costs, and one that costs $2X and is marketed as being environmentally safe, the majority will choose the first. This is especially true as economic forces continue to squeeze average people.

Consumers absolutely participate in the problem, but the only process by which it could be corrected is regulation, and the only entity capable of that is the government. (Democracy being what it is, you can however place more blame at the feet of voters.)