the brother was too stupid. I know he's worried for mc but his emotions took over himself and constantly ignored the warnings(e.g. mc might die of depression due to the mark if him and ml were seperated/ml dies) and I genuinely got SO pissed off because of his irrational decisions. With those said decisions of his caused more harm than good to mc and even though there were signs of the harm he was doing to mc he still decides to ignore it.
Emotions play a big part with the decisions you make, I hope he took a breather and thought about mcs mental being as well, not just physical