If you do not want the Agent Installer to integrate with systemd in a sudo installation, add -systemd false to the install command, see Sudo Versus Non-Sudo Access. For example:

sudo ./zero-agent.sh install --application 'AgentInstallerTestApp' --account 'project-zero' --access-key 'myaccesskey' --service-url 'https://test.saas.appd-test.com' --systemd=false