Don't buy one which looks like that if visuals are important for you. I already told that there are plenty of models which avoids this design and form factor. Do I have to spell out specific manufacturers and models?

Almost none of the Ubiquity stuff looks like that. Xiaomi has plenty of white/gray cylinders or boxes with rounded corners. TP-link has whole Deco series, Asus has ZenWifi series. Majority of MikroTik non rack mounted hardware also targets more neutral design.

You also have to consider who is the target audience for dedicated all in one wifi routers. Majority of regular people are fine with the WiFi that's builtin the modem provided by their ISP. Any serious commercial office will have the IT team to setup separate (rack mounted) router/switches and ceiling mounted access points that look like previously mentioned smoke alarms. People with large enough house to need multiple access points but aren't IT specialists willing to wire up Ethernet everywhere -> various product lines described as mesh routers. Like the trash can shaped TP link Deco series and similar from other manufacturers. If your house is not that big, nothing stops you to buy one of them and ignore the mesh functionality. That leaves people living in small enough house/apartment to be served by single router/switch/Wifi access point combo but for some reason not being satisfied what the ISP provides and also wanting multiple wired connections. Exclude the IT specialists willing to set up home lab and you are left with gamers (potentially impressed by black spider) and few others who have hopefully have enough rationality to place the router where it's not an eyesore or picking some of the previously mentioned stuff.

Another factor is move from antennas that are simple correctly size wire maybe with some spiral which easily fits in small rounded antenna to flat pcb antennas which encourage more rectangular design of the antenna housing and rest of the router. A lot of it is still partially just for the show, trying to give the impression "this one has more/bigger antennas must be better WiFi", but oversized partially empty plastic antenna housing were a thing even before current spider trend.

White slightly rounded 8 legged spider still looks like spider. Trash cans have a bunch of antennas but they hide them in larger volume. Dedicated access points have the advantage of being placed more predictably (near ceiling with little obstacles), they also have advantage of being distributed less work for each of them instead of single router covering whole house.