OK, Discord specifically is terrible. I login in incognito mode from the same location/browser every time, and have to deal with Captcha most of the time.
I use Discord from an incognito Chrome window. I avoid it most of the time, by doing:
1. Email is manually typed, password is copy pasted
2. I move the mouse around in the window in a fairly non-mechanical manner.
I don't know if you use Chrome proper for it, so that could still be a point of difference.