Hmm bots are an issue. I've been noticing more of them lately. If you're on PC the best way to deal with them is to download this add-on and use it when you see groups of bots to report them. https://www.esoui.com/downloads/info1818-BotScanner2000.html
It's too difficult to tell who is a bot at that level. I'm sure they have some kind of bot detection, but it's pretty easy for bot farmers to circumvent that. The best way to help is to report bots when you see them