I think it depends what is meant by "brutal". Some people are simply too busy to beat around the bush and will leave very direct feedback that can come across as "brutal", when that really isn't the intent.
In this case I would try and get into conversation with them about some appropriate feedback they've given and discuss ways to address it. If you're able to have a friendly discussion then it's likely that there's no ill intent. That might give you an opportunity to give them feedback on their approach to code review..
If on the other hand the feedback you receive is blatantly rude and unprofessional I would tell them directly that you think this is so, and inform your team lead that you have had this conversation. If you see no sign of improvement then go back to your team lead... Code review is supposed to be an opportunity to learn and share knowledge; not to vent your frustration on others.
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I think it depends what is meant by "brutal". Some people are simply too busy to beat around the bush and will leave very direct feedback that can come across as "brutal", when that really isn't the intent.
In this case I would try and get into conversation with them about some appropriate feedback they've given and discuss ways to address it. If you're able to have a friendly discussion then it's likely that there's no ill intent. That might give you an opportunity to give them feedback on their approach to code review..
If on the other hand the feedback you receive is blatantly rude and unprofessional I would tell them directly that you think this is so, and inform your team lead that you have had this conversation. If you see no sign of improvement then go back to your team lead... Code review is supposed to be an opportunity to learn and share knowledge; not to vent your frustration on others.