I also have the F310, and have had the same experiences as you. In addition to everything you said, the triggers are stiff and uncomfortable too. The only good things about it are that it's durable and that you can swap the d-pad and left thumbstick with a button press, and there's a d-input mode too.

The similarly priced 8bitdo Ultimate Controller (and probably the Pro2) is MUCH better and also has good customization software and a programmable autofire button. At least the non Xbox branded one does. Based on my experiences with the F310 I never wanted to risk buying the more expensive F710. Because the F310 with rumble + wireless capability doesn't sound like a good deal to me.

I'd rather spend less on somebody I know actually makes good (or "good enough") stuff, like PowerA or 8bitdo.