He got taken out by Domni reverse, a move that the SHP are currently being protected from through plot, or because Imcel doesn't think it's worth his time. Imu didn't casually take him out when Xebec invaded the castle like he presumably did to Zoro and Sanji this chap, nor did he even do it to the young rocks pirates and Crydo, Big Mom, Scrambeard, Dodger, Larp etc
It's not that shocking, but Zoro fans have spent months saying:
Loki would get DR'd and then lose to Luffy/Zoro
Imu will arrive and neg Loki
Zoro shouldn't be counted out against Imcel, because he scarred Crydo
It's a little funny, they did set themselves up.
Also, you do have,
>I'll never lose again