but what happens is that miners build the infrastructure for renewable energies and not exploit the surplus.
Bitcoin mining, by its very nature of being able to be set up anywhere, can actually subsidize and promote green energy projects in remote locations which would otherwise be uneconomical. It can act as a "buyer of last resort" for electricity which would otherwise be wasted:
In what is by now the worst kept secret of the industry, Bitcoin mining actually offers an incredible opportunity to optimise renewable-heavy grids. Miners, being supremely mobile and flexible, can act as demand response systems. They can sit right near the renewable resource (even moving with the seasons) in question — avoiding the need to excessively beef up grids — and dynamically consume excess energy whenever more is being produced than the non-mining market needs (meaning prices are low). This allows for immediate monetisation of energy that would otherwise be wasted, driving down overall electricity costs. In other words it can act as a monetary battery.
Who will bear the cost of recycling? Renewable energies have many negative aspects that have not yet been addressed
You think the environmental impact of recycling old solar panels or wind turbines is higher than the environmental impact of burning billions of tons of coal and oil? Never mind the environmental impact of recycling all the coal and oil mining, transport, and burning machinery and equipment?