Play function without crossserver

This question has been tormenting me for a long time. Why doesn't the administration introduce a function (a button or a "check mark") that allows you to disable the ability to play on a BG with a FAN server? Is it really that difficult to implement? In fact, I don't understand at all why they introduce a crossserver with FAN. It's stupid and unfair. A player who spends a lot of time leveling up a character/equipping him is forced to play against guys who sat down on the keyboard with their ***, wiggled around on it, and got max level and top equipment. And it's not that I have a hard time playing against such people (my character is well-equipped enough that I can play with them on equal terms), it's just that I don't feel any pleasure when I defeat them. It's like I'm fighting mobs. I understand that these people can simply delete their character and a second later create another one with the same high gear. I don't get any pleasure from defeating such people. And don't tell me that it searches for matches faster. You have 5000 people online!!!! What queues are we talking about? I played on a server with 1200 online, and there were constant BGs (and it was a blizzlike without a cross-server). But even so, I'm ready to wait at least an hour, two, three... but only to have fun, and not emptiness.
So why don't the admins add a feature that will allow disabling crossserver for those players who don't want to play against players from a FAN server?

I just got owned by rogue from blackrock with S2, veteran gear and WEAPONS FROM KILJADEN. Do they get PvE gear free aswell or how is this possible? His guild have 21 people with alts. I am not saying its impossible, Id just like some insight about PvE gear from blackrock.