I enjoy my function and the overall goal of the company but I am motivated by career progression and growth in responsibilities more than anything else; my ultimate goal is to become a great senior level manager - so much of my focus, efforts and the experience and projects I take on are tied to that and how to get there.
I have been recognized for being a good junior manager and later a department manager, but there have been many changes, restructuring, acquisitions over the past year, that I somehow ended up being excluded from the closer circles of leadership and now I feel like a... "tiger in a cage".
I am expected to do more technical/individual work rather than managerial work; I am asked to do things without knowing why or having a say in the decisions, but when things go wrong I am asked why it went wrong and what I should have done; new managers take over my areas of responsibility and I am kept out of the loop. And I am somehow responsible for anything that goes wrong at very technical details... which I haven't even trained in.
It's important to note that I have a "passive" line manager, i.e. he hired me but I no longer directly work with him. Instead I report to multiple senior managers who assign me projects and tasks in various areas, for which I can use my team and external contractors.
They don't want to get more resources so I often end up working overtime doing work I never signed up for. There are business meetings about what we do, but there are no "1-on-1" meetings about my performance and career, except once a year with my line manager whom I never actually work with. I truly wish I could find some career guidance but there is nobody in the company who could give it to me.
The multitude of issues is really demoralizing me so much that I see no purpose in my day-to-day work, and my mind is elsewhere most of the time. I am sure I must have increasingly dropped in my performance without even being aware of it, only to be told off by my new superiors.
I am doing many mistakes I would have never done under normal circumstances and I am missing many opportunities I would have never missed under normal circumstances.
How can I restore my usual performance level, return to excellence and be great just as I used to be before this whole mess started?