Where from?URL?I followed google advice for 32gb root partition
If I am reading and interpreting that second screenshot correctly the installed size of those 'tools' is over 46 gigabytes.
On second thought -- OP has a mess there! It'll take more time to move things around on such a large hdd that it's not worth it, IMO. I never have messed with bitlocker, but you'll have to turn it off before anything can be done to clean things up. Once done, show what space is being used in sda3 and come back here for further suggestions, is my suggestion. 666 is a good handle for such.
Before I'm not too far into my install. Should I reinstall and use larger root partition?
sudo apt autoremove
sudo apt autoclean
sudo apt clean
du -ah /var/cache/pacman/pkg
sudo pacman -Scc
sudo pacman -Qdtq | pacman -Rs -
sysctl vm.swappiness
Blackarch won't install, lul.