Hi Marcirecovery!
As BertH stated, please do not rely on Google for a timeline on when you should be better. Even posts on this forum can vary on recovery time.
There are many, many factors which can cause your recovery time to vary. One factor can be where you had your surgery. Some hospitals and doctors do not have much experience in treating acoustic neuromas, and sad to say, their success at treatment and the recovery time can vary greatly from specialists and facilities which take care of many patients with ANs. Another factor can be where the tumor is located. From your description, it sounds like yours was more complicated than many others. Hence, you might not be able to go by a 'standard' recovery time. It only makes sense that a difficult procedure could have a longer recovery time. Other factors can include the patient's overall health and age. Younger people tend to heal faster as do those who are in good health (compared to those who have a number of other health issues).
I am not a physician and no longer work in a hospital setting, but I just want to assure you that while there are often general recovery times which are true for some patients, those general times are not true for everyone. Some of us just take longer to recover, and that is okay. Please do not worry about how long it is taking you. Your recovery journey is unique to you!
Best wishes on your continued recovery!
Don