i need help. Whenever i go into a match i spend about a minute on a loading screen then get kicked out and get a penalty. On the rare occasion i do get in i am on the agent select screen but with no agents. What do i do?

I'm walking around more than running, so it makes sense to me to have walk speed as the default and press a key to run. But since "shift" is a usual in-game call for walking, I'm guessing I'm in the minority? Is there a reason that I'm not...