We could have arguments all day about her artist development and whether she has grown as an artist or not.
However, sales wise-- absolutely. She is declining and steadily. I think she will always have a solid fanbase, but it's hard to stan for someone who literally does nothing.
Interscope is definitely not to blame. Lana does not like to promote her music. She will cancel promo that they schedule for her (i.e. David Letterman). She makes music for herself; she has literally said this. Interscope would put the money down for a music video if the artist was going to bring revenue. Lana has poor sales with this album, so it makes sense that they would not invest in a large video production. Lana does a lot of these videos out of pocket, I'm sure. Even artists like Taylor Swift make their music videos out of pocket because their labels don't give artists an unlimited budget. Doesn't work that way.