Hello Dramos! Even a seemingly small component can have huge ramifications on performance. You are asking LayOut to flatten your 3d model, the more geometry the longer it will take. 70mb is a pretty big model.
Also, your specs are low specifically on graphics. Check them against this thread… https://help.sketchup.com/en/sketchup/system-requirements
Try right-clicking on your battery icon, change to high performance.
I am assuming you are on a laptop because you mentioned the Intel HD graphics. This is about as weak as it gets, the most basic graphics for browsing web and word processing. It’s likely you have another card. You might need to “force” SketchUp to use it. If it’s an Nvidia card, you do that through the Nvidia control panel (right click on your desktop), manage 3d settings. Verify the card SketchUp is using in preferences > open gl > graphics card details.
I’m sorry you are having trouble, but I promise that ConDoc is only doing what you are asking it to do… and on your machine it is going to take a long time to flatten that model! Let me know if any of these tips help.