Silksong kept me pretty far away from these forums, but anyway, back to the routine.
I think I got too hyped up about Jade's supposed “fight” with the bodyguard. It was like watching Saitama defeat giant monsters in the blink of an eye on a lower budget—very anticlimactic.
Unexpectedly, her brother's death hurt me a little. In the end, he always put his family above everything else, and that's worthy of respect. I think Jade felt the same way.
I thought it was good that some of the love interests got on with their lives. After all, Jade doesn't own anyone, and they can do what they think is best. Still, they all have a little bit of Jade inside them. If there was one thing missing, it would be a flash-forward sequence, maybe Jade as a major at a family barbecue, but I guess there aren't many resources for something like that.
So I would say that the ending was good, but I think it could have been developed further.