You want to have your cake and eat it too. You pay those corporations to pollute in the process of getting you the things you refuse to live without. You vote for those politicians to enable your consumerism and then blame corruption for the policies they pass to give you what you want. You claim that regular people can't afford the needed changes, yet you insist on eating meat and using cars to get around as if those are free. You claim to want corporations to increase their operating costs to be more sustainable, but you complain about your purchasing power decreasing. You blame corporations for greed, but you insist on a personal electric car because you would rather spend >$50k than learn the difference between walkability and only being traversible on foot.
Not all corporate emissions are for private consumption, but most of them are. Not the whole decrease in personal purchasing power is from decolonization and switching to more sustainable production processes, but a decent chunk of it is. You will have to sacrifice products if you want any hope of a better world.
If there is one ray of hope I can offer you, it is that you seem to have too little faith in the quality of life in a degrowth economy. Modern walkable cities are more pleasant to traverse for more disabled people than car-centric ones, with mobility scooters and public transit chauffeurs. Alternatives to meat are delicious if prepared by a competent cook, and it's easier to get a competent cook to make a fancier meal for you if you share meals with flatmates. Without SpaceX-raised satellites your internet and television connection might be worse, but as you share a meal your human connections can be stronger.
Corporations have spent the past 150+ years permeating every form of media about how necessary it is for you to consume and consume and consume. You don't need their products nearly as much as you think you do, at least in the long term if we work together.
Why do you think it doesn't scale well? The ocean isn't going to run out of water, and Texas being huge only means it's easier to find space for all the solar power you would need.
I'm also curious about what you think the alternative is.