It is important to accept 'negative' feedback

During one's PhD, there will be - or should be - a lot of feedback because PhD is primarily not about getting the title but about learning how to be an independent researcher.

The feedback, which is received, shouldn't be even distinguished as positive or negative. Those words lose meaning a little. Because what is important is whether the feedback is constructive and whether it will lead to improvement of future work.

Also, I find that many of us get easily offended because we take it personally and as too critical or negative. But a more helpful approach is the above one, of objective evaluation and selecting the key message for the self-improvement.