Why does it seem difficult for my envoy to accelerate even if I floor the pedal?

What is your question?

Every time I start my 05 envoy and start to drive it seems extremely difficult for it to accelerate even at a low speed. There is a low, almost like a whining, noise any time I press the gas pedal to accelerate but the engine is very loud just in general. Even when I floor it, it takes about 10 seconds for it to register and attempt to go faster. And almost seems like it's barely shifting gears. It's got zero "get up and go" to it like it just doesn't want to drive at all.

What makes this problem better or worse?

When the heat or air is running

How long has your 2005 GMC Envoy had this problem?

About a week, but it did sit out of use for about a year or more due to a busted wheel bearing hub