Dell Venue 8 Pro Issues

Ever since I got my Dell Venue 8 Pro, it has always had some sort of problem.  First and foremost, my warranty expired in March so I won't be able to do anything with that.  The three main issues that I've had with this tablet include:

- Not connecting or staying connected to the internet
- Keyboard is glitchy, will press one key and will insert 2-3 letters (i.e. - outstanding will look something like "ouuutstanddinggg")
- Battery will not charge (this started last night and is stuck at 88%)

I don't use this tablet often because of these issues but I wish I would've done my research before purchasing because I feel like this was a huge waste of money.  It is too hard to do anything in desktop view and I can't get apps or games like I can with my Android phone which disappointed me.

Anyway, has anyone experienced these issues before and/or know how to fix them?