I don't like Bing for a simple reason, it doesn't give me the search results I need.
I too resent Google's invasiveness. It was one of the reasons I got a windows phone.
However, the default search engine for Cortana on my windows 8.1 phone is Bing, and Bing just doesn't work well. I'm posting this because, just yesterday, I tried to get some simple information on my way to town to do some errands. For example, I wanted the website for a bank so I could check the hours the bank was open. I give the name of the bank and the city and Bing supplies me with a page full of websites that report on banks -- but not the bank's own website. I give the same information to Google and it gives me the banks website and I get the information I need.
This kind of thing happens to me a lot. So, no matter how much I would rather not use Google, it is my preferred search engine. Why? Because it works. It gives me the information I'm looking for, usually on the first try. I can't say that for Bing.
I'm told that Microsoft monitors these kinds of topics, because they have a business interest in Bing becoming more popular. So -- Microsoft, if you are listening -- and you want more people to use Bing -- you are going to have to improve it. It's that simple.
In the meantime, I'm probably going to dump my windows phone when my contract is up. That's how much I am annoyed with Bing. I need something better.