>>Segwit destruction will snowball. One miner will figure out it is more profitable to skip verifying signatures. Then two and three figure it out.
the already low chance of finding a block will be accompanied by the risk of having found an invalid block.
You do realize that 'finding blocks' isn't like flipping stones to find something below it?
You describe it as you were searching for those blocks in the woods and sometimes find a broken one.
If a miner publishes an invalid block, it won't get accepted. The next
valid block will be added to the chain (and is going to be used for the work of the next block).
I suggest you lookup what a block [1] and a transaction [2] is. You might also read the bitcoin whitepaper [3].
[1]
https://en.bitcoin.it/wiki/Block[2]
https://en.bitcoin.it/wiki/Transactions[3]
https://bitcoin.org/bitcoin.pdf