Hi. Normally you should provide your steam ID or a link to your steam profile so we can check. Your name is quite distinct, so I assume this is your profile, right?
https://steamcommunity.com/profiles/76561198053250445/If so, you were banned using the broken NetID ban system, so I can't check the given reason. The admin who banned you may choose to respond and clarify things.
You are comparing team damage during a fight with intentionally attacking your team. These are different. We specifically do not allow the latter. For the former, first of all, it happens, especially in group fights. Some people are less careful, especially new players. You can:
- Ask them to be more careful (in the chat)
- Vote kick them
- Ask admins for help
Instead, the admin most probably saw you attacking teammates and banned you. Also, how do you know that you were the only one banned?
Regarding that, your ban was turned from the NetID (which is indefinite/perma) to a week long one and will expire on 2020-02-23 at 07:38:33 GMT.