Let’s talk mushrooms

Years ago when I was a young lad I worked weekends and school holidays in a mushroom farm. We grew mushrooms in warm dark damp growing houses, and when finished growing the house was gassed to kill any bacteria growths, the spent compost was then dumped in a farm yard and was available to locals to buy it for their gardens. This never grew any mushrooms, however, we then converted a number of glass houses, insulated them with polystyrene sheets about 3-4” thick, it didn’t darken the glass house but eliminated the UV light. The ground was concrete and we placed bags filled with compost, spawned and peat on top onto the concrete the mushrooms grew on these bags, later when growing was finished these bags were sold off (my weekend job) to locals, but as it was not gassed there was often mushroom growth in the gardens where it was spread. These were just not white button mushrooms.
I have tried some growing kits button and oyster type, I tried them in the garage and I tried them in the poly tunnel with very poor success.