@iska Is this common nowadays or is it just the model that you have recently bought? It's sad if it's the former.
Why not WRT3200ACM or something similar then? They are still pretty decent spec-wise (unless you need 100Gbps wireless or whatever they have these days — doesn't make any sense to me 😄), have lots of ports and should be well-supported by OpenWRT?
@m0xee@social.librem.one that older router I use is network-flashable.