The provided file does not indicate anything out of the ordinary, in regards to device configuration.
The logs though last only about 3 minutes, not much happens during that time. However, some weird action is visible between RUT and Starlink. At first, when RUTX11 asks for an IP address from Starlink, it is given from 192.168.100.1 DHCP server and the lease time is only 5 seconds, which is very unusual. Approximately every 14-18 seconds RUT asks for a renewal. This lasts for about a minute and a half, after which Starlink does not reply with a new address. Then RUTX11 sends a new DHCP discover request, this time the reply comes from a new server 100.64.0.1 and a new IP is leased for 300 seconds, which is still rather low and would require RUT to send renewal packets every 2 and a half minutes.
My guess is that the issue is on the Starlink side. Do you have any way to check its DHCP settings?
Have you tried connecting any computer/laptop to the Starlink, to check performance without the router in between?