That sounds more like an issue with people being sore winners/elitists/jerks, rather than people simply playing to win. And every fandom has those. Even some of the suppose "casual" players are like that too, from my experience. No side is immune.
Again, it is a tournament. I do not know what else you were expecting. You are in a play to win environment. Maybe there was a prize. Maybe there was an entry fee of some sort. Even if there was no fee or prize, it should not matter.
If this was a purely casual event(And even that is opening an even bigger can of worms.) then I can see your point. There really should not be a reason at all to metagame/tryhard in a casual event. Course, people should always try and play to win, no matter what the format is. Just obviously tone down in power compared to a more serious event. But this is not the case for this particular event here.
When I started playing, I really liked doing
booster drafts. They are more expensive at times. But its a decent way to get a collection up, as well as teaching you how to understand card value.
There's also software called Cockatrice from woogerworks that can let you build up decks and challenge players online, but it's not automated so you have to not only count on yourself not to misclick, but also make sure your opponent(s) don't as well. I would really only recommend this if you have people you can play with that you know personally. Also, updating sets is kinda a pain sometimes.