Stop pretending luck exists and you'll get better at this game. Sometimes your opponent draws a threat and you don't draw the answer. Sometimes you draw seven lands off the top of your deck. It happens and it is out of your control.
The problem with calling these situations "unlucky" is that it doesn't cause you to evaluate what you could have done better. How was your opening keep? Were there alternate lines of play available to you at any point and why did you choose the line you did? My point is that you should always evaluate your own play rather than shrugging losses off as "unlucky" and just moving on because you don't learn anything. Be your own harshest critic. Don't accept a loss without evaluating and understanding it.
If you and I are rolling dice, luck is the only factor because you are unable to impact the outcome. In Magic you get to make all the decisions, so you are able to impact the results. You can't completely control them, though, and you will sometimes just lose despite optimal play. Accept it as a variable of the game, but don't call it unlucky.
If we were discussing Chess I'd agree with you (chess being a game solely of strategy and skill - MTG being a game of Strategy, Skill and Luck), however, you're denying the obvious here. What was I supposed to do in those situation?... The fact is, there was nothing I could do... due to bad luck. The odds were in my favor to draw a land or to draw a removal but I just didn't, there was no other factor involved outside of luck. Denying the existence of luck in MTG is absurd.
I would classify my skill level at Magic as above average, I've been playing for years and I, generally, know when to keep a hand and when to mulligan the hand. I did everything I could have done with the deck at the time, I lost due to bad luck. Don't assume because my number of posts is low that I don't know what I'm doing.
I posted the deck because I've had a lot of success with it and figured that people might like to try it out for themselves.