Anyone know why sketchup free is glitching and being really slow on my computer

SketchUp Make still available here:

Totally free, and apparently with a fuller feature set than the web version. I’m no expert, only been doing this a month, but I’m loving SketchUp Make.

I’m guessing (only a guess) that the download link to SketchUp Make will vanish at some point, so you might want to download it now even if you’re not ready to try it.