How many memory have you got in your laptop? perhaps you don’t have enough in your laptop…
The Tor network will still be slower than with a “classic” connection and if you use a VPN, it will be even slower.
I don’t understand why you change the set up sys-vpn. If it works with other AppVMs, then no need to tweak it.
I don’t use tor with vpn but you can take a look in this tread:
In your case, you’re using wireguard and NOT openvpn…