Google builds entire datacenters with their own transformers and power lines, if not their own powerplants. You plug these datacenters directly into the high voltage networks that don’t have big capacity problems.
The low voltage grids in residential areas on the other hand were build as cheap as possible, so increasing the load by 20% is already too much for most of them.
And both of these companies build and purchased more renewable energy sources than all 100+ countries combined. Microsoft has committed to be carbon free by 2030, and while I don’t belive in their commitment, they at least seem to be trying contrary to most nations. They even invested in nuclear plants for their power needs.
You can fault both companies for a lot of different reasons, but in terms of carbon emissions due to power usage, they are better than 99.9% of the countries on that list.