I’m guessing you probably don’t have the air intake part of the equation. A lot of newer, more powerful hoods require an air exchanger that blows in outside air to equalize the pressure from the hood blowing air out.
The faster the hood blows, the more it struggles to pull air as the pressure in the room drops. An exchanger fixes that.
I think it initially does, but then the difference in pressure basically works against it, as the pressure inside drops