It is ridiculous to lose to a bot with nearly zero ECR because its set on an auto battler and can literally battle 24 hours a day. Very easy to fix this by introducing a very simple pop up captcha that randomly pops up approximately every 10-15 battles. Many games already use them so its easy to implement and easy for a human to instantly banish it and resume fighting
unfortunately captcha doesn’t always work for everyone
Keep in mind that ECR is already punishing them. They are not getting any better rewards than someone who plays 30 battles a day.