You took advantage of the company's open door policy, your manager blew up at you, and you want to know if you did something wrong? What's wrong with this picture?
In the first place, it is unacceptable for your manager to blow up at you, period. And, the fact that he did so after you met with senior management leads to two key points: he is not going to be winning any gold medals in management, and, secondly, with a manager like this, it is not surprising that you used senior management's open door policy.
Nonetheless, it is important to note that many companies with open door policies expect the employees to try to initially resolve issues or concerns by going to their direct supervision, and use the open door policy only if they are unable to achieve satisfaction at that level. Typically, if you approach senior management with a problem that your own manager can resolve, it is reasonable to expect senior management to hear you out, while suggesting that you deal first with your manager, and then come back to senior management if the issue remains unresolved.
Since you have an exploding manager, senior management may find many employees from your department coming to them rather than to him. If this is indicative of his overall managerial skills, senior management may consider a different open door for him.
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