This is to the OP, and others who feel the same way.
RMT Groups and Merc Services Groups, always target the largest possible source of customers.
This means that those Groups are mainly on Asura, because then those Groups will be close to the biggest number of possible customers.
This means that those Groups are less active on other smaller and quieter servers.
For example, I have not heard a single Merc /shout on my server, Leviathan, for about three years.
We do sometimes get RMT gilseller /shouts, but they don't try very hard, because Leviathan has a small population and most people here don't want to buy gil or pay for Mercs.
So if you want to avoid RMT and Merc activity, and all the Drama and /yells, move to a quieter, smaller server.
You will find that a lot of the original FFXI Veterans And Legends, stayed on the smaller servers, and they refused to move to Asura.
Because they wanted to keep playing FFXI in the old traditional ways. They did not want to change anything.
Many of us felt that FFXI in 2004 was the perfect computergame, the greatest computergame ever created, and we still feel the same way in 2018.
So we do not want to change the game, we want to protect and defend the original FFXI game, and to cherish the culture and values of this beautiful world called Vana'diel.
So if you liked the original FFXI culture and values, you may find there are many likeminded friends waiting for you on the smaller servers.
If you are on a big server, spend less time hanging round Towns. There are no /yells in the wilderness areas, when you are hunting monsters! Except maybe a <Call For Help!> lol.
Network with people. Talk to them about your feelings about RMT and Mercs. Try to find like-minded friends, friends who do not approve of RMT Gilselling and Merc activity.
Form a linkshell with those friends, and do events, without anybody on the LS ever using RMT Gilselling or Mercing services.
People have networked and found friends who wanted to play on capped level 75 characters, levelling mules to level 75 and locking the character on Merits Mode, and never doing the lvl 76 LB.
Then they do events as LS members, all level 75 characters, doing the Original FFXI Content, in the beautiful areas of Vana'diel.
So there are people who have moved away from the mainstream game, and are playing at level 75, and they networked and made linkshells with other likeminded people. So it is possible to also make a LS for people who disapprove of RMT and Mercs.
Vana'diel is a hugely expansive and intricate world, and it is easy to forget how amazing Vana'diel is, when we spend all our time in the Towns, listening to /yells, or doing Ambuscade etc. all the time.
Try exploring Vana'diel again. Be an Adventurer again. Be a Hunter again. Be far away from the /shouts and /yells and the mainstream greed games.
Level a new character, level a mule, or just level a new job, go travel Vana'diel, making new friends, having adventures, and not listening to /yells in the Towns.