First of all, please do not open several topics here if you have questions. You can use one topic for all your questions or issues.
We are here to help.
We will have a look on the lagging issues you are experiencing.
Discord server are not equal stable like a dedicated teamspeak server. Discord server are quiet unstable because they all are hosted in a cloud without much control about it. You can try to swap the discord server to a different hosted location if you just got a bad virtual server in the discord cloud.