Mining is all about using waste heat or stranded electric. If you aren't tied into one of those or winning the lotto solo mining you are going to get fewer sats than buying on the open market.

My s19 heated my house all winter. Paid for itself and future winters sats are all profit.

I'm also planning to build a food dehydrator and a fish tank heater out of miners. I was using the electric anyway so 100% of sat rewards are profit. 

nostr:nprofile1qqsy6q3ua80awknlxp6m368qssqghct6ra6scca4meepumhcswkuwegpz9mhxue69uhkummnw3ezuamfdejj7qgawaehxw309ahx7um5wghx6at5d9h8jampd3kx2apwvdhk6tcppemhxue69uhkummn9ekx7mp0hzcsrt already built a dehydrator and converted his electric dryer to get heat from a miner too. He even used a miner to make maple syrup.

Others are heating pools, hot tubs, home hot water, and greenhouses.

It isn't that mining is unprofitable, it is that you didn't do the work to figure out how to profit and thought you could just turn on any random miner on residential electric rates and get a free ride.