Windows 10 Firewall warns about being disabled on every login

You can disable Windows Defender Firewall with Group Policy. In the administrative templates for the computer, go to Network | Network Connections | Windows Defender Firewall | Standard Profile (or Domain Profile if your computers are connected to a domain network) and set "Windows Defender Firewall: Protect all network connections" to Disabled. As the policy description says:

If you disable this policy setting, Windows Defender Firewall does not run. This is the only way to ensure that Windows Defender Firewall does not run and administrators who log on locally cannot start it.

With the policy disabled, the Windows Security dashboard says "no action needed" for firewall & network protection yet confirms that the firewall is off if you open that section. Notifications about the firewall are disabled, but other Windows Security notifications (e.g. about threats found) still appear.

To apply that policy setting without a Group Policy editor, navigate to or create the Registry key...

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile

...(or DomainProfile for a domain network) and create a DWORD value named EnableFirewall set to 0, then reboot.

You can disable these notifications. My version of windows is dutch, so I have to translate for the correct location. Sorry if I made a translation error and the text you see is slightly different.

Go to Start -> Settings (gear) -> Update and Security -> Windows Security -> Firewall and network security.

Scroll to the bottom of the page where you have the links to other settings, and click Settings for Firewall notifications.

Below Notifications, click Manage notifications.

Turn everything off or take the time to read and decide which notifications you want to keep, but given your quesiton, you likely want to turn them all off.