This is somehow haunting me and would appreciate your input here if you have been through something similar or a word of advice about my mistake which I'm unable to point out myself in this situation. I'm into a technical field - structural design and in mid senior level post and so far doing above avg in my career. Last year I worked on a landmark project where I could learn a lot and first time got an opportunity to work on such a project.The project is very huge and generally big construction projects take a few years to to pass the design phase to construction phase . After last year's 60% design phase exactly after a year it came back for 90% phase . Me along with a couple of other engineers were a part of it last year. Coming to my manager : she never involves technically in the work. Her way of work is delegate all work and let us handle the work independently . Off course she's in the picture but not totally unlike other seniors and she doesn't get involved much to guide us technically . Totally "it's your project your headache attitude ". When the project came this year it was totally my responsibility and the others who were involved in this last year couldn't be a part of it because they were busy with something else and when it was this project I was the one primarily involved and involved in all the work which the others were doing it last year . Coming to the issue : A couple of months back a lot of issues were running and it required some complex solutions to be given. Being a first of a kind for me I couldn't give much solution and this manager lady who is hardly involved technically couldn't help either. I struggled but I managed somehow to come up with some ideas . This made the person with whom I co ordinate in the USA for the work think that I'm not able to manage my work well and pointed out that I did not come up with innovative solutions. Also he's the same person who gave good feedback last year about me and I got an opportunity among other engineers to travel to the site in New York City because he applauded my work and initiated hosting me and sponsored my US visit through the project money. Okay it hurt that he gave a "not so good" feed back this time around but it's fine,rise and fall is common at workplace, I accepted his negative feedback in a positive manner and moved on and continued my work on this . But because of very personal reasons I decided to take a break from my career and I submitted my resignation too last week which was accepted after much discussion and options with my manager. But as work is going on issues kept coming in the project and I was working in every possible way to give some solution . A blunder (done by other engineer last year )came up which was pointed out to the US counterpart by me .Not that I didn't discuss with my manager here first. It was discussed but she chose to not bother and adviced me to ignore . My engineering practice and honestly did not allow me to do that. This pointing out of blunder made the US counterpart point out how my manager (the lady ) hasn't performed her of duty checking the design and such blunders and further changes in design are not acceptable at this point of time in the project.. Also the blunder was pointed out because they kept asking me justification about change in the design and why the same was not pointed out in 60% design phase and they escalated this blunder to higher authorities in the organization both in India and North America office. When there was a blame game from their end this manager of mine conveniently took the credit stating that she found that blunder and she was the one who pointed out to me - all this right in front of me in emails with him to save herself. I know I'm in notice period and will no more be a part of this project and she had to defend to save herself and her job because such blunders in engineering are not acceptable and something fails once construction happens it becomes a black mark for the engineer and the company . But what is hurting me is she who asked me to ignore the issue took credit for it. Such manipulation from her is something I'm unable to accept nor point out to anyone higher in the workplace at this point and feel so bad/annoyed about this entire thing. In my career span I have never faced with any negative feedback by anyone and this manipulation by her is something I am unable to digest. To what extent should one take such career challenges personally? I'm wondering.