With/Without Cairns

I think I might actually be slowly outgrowing Magic Online, what has been for years now a sink hole to dump unfathomable amounts of time and money into. I like looking at the cards, reading about them, and I like building decks. But, when it comes to actually playing the card game I keep getting frustrated by my insufferable losing streak.
I don't want to win every single time, but it is annoying when I spend time designing a deck, collecting the cards, and then find that in practice it doesn't work at all. I'd be happy winning 60-75% of the time, but really I do around 30%. I've though about just modifying net decks for fun, although I haven't found a good source I can rip from. The only deck that I enjoy consistently playing is my Caretaker of Memories deck based playing out basic 'fair' creatures with a variety of evergreen abilities and then dropping Cairn Wanderer. I'm not sure what I'm going to do when Cairn Wanderer rotates out of standard, right now it's the only card I like playing AND also wins games (and doesn't cost absurd amounts of money).