Hi, I wrote a shellscript tool called deplaydroid and we could use it install/uninstall apps from F-Droid easily. Besides, if you own root permission, it even allow backup/restore apps like Titanium Backup did. Here is the quick start, more information please read the homepage. Enjoy!
# download deplaydroid
wget https://gitea.com/fasheng/deplaydroid/raw/branch/master/deplaydroid
chmod +x deplaydroid
# enable command completion for bash
source <(./deplaydroid complete --bash)
# fetch F-Droid repository index.xml file
./deplaydroid update
# install applications
./deplaydroid install org.fdroid.fdroid com.nextcloud.client
./deplaydroid install org.fdroid.fdroid=1007051
# upgrade applications
./deplaydroid upgrade
# backup applications
./deplaydroid backup org.fdroid.fdroid com.nextcloud.client
# restore applications
./deplaydroid restore org.fdroid.fdroid com.nextcloud.client
# deploy nextcloud from profile
./deplaydroid deploy --profile example/deploy-nextcloud.sh