i am too on paris.
Ok i tested it more deeply.
I have nginx for webdav and apache2-for nextcloud.
And both those services gives me very slow download, when i am trying to download something from my local pc, local isp.
But iperf3 from my local pc to scaleway iperf3 -s gives me very good rates.
So probably i have to reinstall vps, my ubuntu is maybe broken in some way on some networking layer?
Or maybe someone can point me to it - why iperf3 gives me very good results but nginx and apache2 with or without ssl gives me very very bad?