Tank entitlement vs group entitlement

[Fyce]

Overall this is mindset that the group was within their right to remove the tank, and they just asked the discord group for a tank to fill in, the wait was not that long for them since I filled in, it just got heated in the discord because when someone asked why the tank was removed they gave the reason. Calling them selfish and entitled etc . . . which got me thinking since I do not understand why people have this view.

Yes, they were in their rights to remove the tank. And people were also right to call them selfish and entitled. One might also argue that the tank was selfish and entitled too.

Again, it's just a case of irreconcilable gameplay, and the minority get kicked. There is no clear rule about this, simply because it's a case by case basis.
The only "rule" that exists is: when gameplay differences are the issue, the majority wins. And that's it.