(My opinion):

I think the maps aren't really the problem. It's the decisions that are made revolving these maps (and other maps) that has become an issue:

Naturally the server has players with different skills and map preferences. Some people are still trying to complete the map, in contrast with those who have overplayed it. Given that this is supposed to be a "beginner" server there's generally a handful of people that take long to complete these maps meaning these maps could be on for at least an hour at a time if there's constant voting to extend it.

The real issue is how many times these maps get chosen a day. You'll find for example kitsune2 has been played at least 3 times within a day with each session being at least an hour long. It gets annoying. On one occasion kitsune2 was on for a solid 5 hours.

Then there's the shit-talk that happens when people rtv the map, insults thrown based on player skill, the begging to rtv, the begging to extend, etc.

And why I think these maps are played so often a day is due to selfishness and abusing the "nominate" system. "If the map I want wasn't chosen I will simply nominate it again immediately after the map-change, talk shit about how the current map sucks, wait 9 minutes to rtv, shout vote like there's no tomorrow, until I get what I want and fuck everyone else."

If these maps are removed, it's likely that people will just substitute them with other maps, over-nominate those maps and play those for several times a day for hours.

A possible solution would be to restrict the amount of times these maps can be mass-nominated a day.