My best advice, never stop moving. Learn a few characters in each class, so you have versatility, Overwatch has a bunch of choke points and your character has EVERYTHING to do with it, learning the weaknesses and strengths of each hero is how I got a leg up when I first started.
Connections are fine, when I boot up my X1 it powers on fine, but it acts as if there is no HDMI cord plugged in..just black screen. I soft reset i (holding button and unplugging cords) and still nothing.
After sitting for a few days, I tried booting it up, it loaded fine, display and all. Went...
On a serious note, open up the controller and check if everything wired properly, seems silly but as you said you opened it up and sprayed grease in there... you might have ripped a wire out.
Check out Afterlight on the App Store! Its paid but you can adjust everything from the shadow tones to tilt shift lens effects, only app I have ever happily paid for.