Hey!
Auto-clicking is against the rules. You can report anyone breaking the rules within the #bedrock-ingame-reporting over on the Hive Games Discord server. Alternatively, you can message a Moderator here on the forums.
The idea of a CPS cap has also been suggested before, please use the search function () to look for the suggestion beforehand to avoid making a duplicate. The original suggestion can be found here.
Additionally, knockback on the Hive is completely custom-coded, different to that of vanilla Minecraft. You can also only hit a player every 500ms, so CPS really isn’t too much of an issue.