Did you try to read the manuel? I had the same loose ball when it arived and I was installing it in my truck in the Fedex parking lot. I saw in the install instructions that there was a screw to tighten if it was too loose did so and no problem. I work construction and smoke so my windshield is very dirty and it sticks fine. This is truck and it bounced around like crazy and the x50v has never come loose. It looks like it might so I took the mount part off the pedestal and while tugging with the other hand checked the hold. It is solid or at least not likely to fall out. The axim looks to be a little wider than this thing was designed for but would take some serious pressure to get it out. I plan on carving out the foam a bit on the weekend just for my peace of mind.
I am not saying you are imagining things but this seems to be a quality issue or defective unit than a design one, maybe with a little setup problem :) . I think I got good value for my $40.00 there is slight hum from the speaker but you can't hear it unless you put your ear right up to it. The suction cup has metal plunger that sucks it upto the glass mine would be hard to remove without releasing it our peeling up one corner to let in air. I was either very lucky or you very unlucky.
This is a bargain unit now we have heard of two of them that are defective. Buyer beware especially if you don't buy from buygpsnow that have a great rep of standing behnd there products. If you notice any of the descibed defects return it right away and don't use it
I may have bought another unit now just because I never thought it was so handy and the price is what sold me on getting one. Now I sit in the truck and use a blue tooth mouse and kb to type while it sit in landscape in the mount and watched a movie while waiting for pizza tonight. For in car navigating it is must.