I think that all this hype around the harm to the environment due to bitcoin mining is exaggerated and there are many other types of human activities in the world that cause more harm to the surrounding world. But for some reason, mining has recently been criticized from the standpoint of environmental friendliness.

Will mining be banned? Let's assume that it will be forbidden on an industrial scale, but who can forbid doing it at home in small quantities? Supervisory authorities will not be able to check or track this.

The difficulty of btc mining is only affected by the number of miners, isn't it? How will the problems of big mining companies affect btc mining ? It seems to me that these are their expenses, which will affect the profitability of their business, but this should not affect the mining itself. Let's say they stop mining due to low profitability (due to the ways voiced in OP's question), the hash rate will drop and this will become beneficial for small miners. Still, there will be those who want to. It will even be better for the bitcoin network due to better mining decentralization.