Hi,
(sorry I speak French, so I am writing in English here)
I finally made it work, therefore I can help you!
Your settings are correct, I would just remove the Phase 1 and 2 algorithms (I don't use them...).
With the same settings as yours, I checked my syslog and found that:
Sep 6 15:21:40 jean-FriUp NetworkManager[1265]: 003 "583c4eb4-e3d7-4abc-ba9c-c4997d9f1117" #1: we require IKEv1 peer to have ID 'MY_SWISSCOM_IP', but peer declares 'A_LOCAL_IP'
Therefore, in the VPN configuration, in IPsec settings -> Gateway ID, I just put the A_LOCAL_IP (in my case 192.168.1.161), and boum... it worked!
I hope it helps you as well. Best regards,
Jean