yes I am
I use a Lenovo computer, which I got for my birthday almost 2 months ago, and yet its FPS is 2 at best in gameplay.
If you have a way to force your computer to use a dedicated GPU, do it. I know some laptops have like a general-use mode and a gaming mode that they (usually) automatically switch between.
Depends on the computer. Tf2 has an option to disable or enable multicore rendering.