There's no way that the preconstructed free decks can get you to platinum rank and have a 60% win rate unless you're in the MTG hall of fame or something. The cards are just so underpowered compared to net decks at that level I imagine.
Plus it's incredibly boring to unlock them. I've done two colours but it's mine numbing.
Maybe I'll just drop the game again. It's a shame as I love it (so much so I listen to a podcast about limited - limited resources) but I can't take losing. It's like it's fun right until I lose for the tenth game in a row and then in want to throw my phone out the window. It's not healthy.
No reason to lie. There is a big luck factor in the game so despite going against more expensive decks, it is not impossible to win with the preconstructed decks. The highest tier usually play on Diamond but I have beaten players using decks filled with God cards or really good synergy. Based on luck and a little bit of skill (I don't consider myself particularly good).
Some examples of changes I've made to the pre-constructed decks:
Stomp Stomp: Added embercleave (1), Ironscale hydra (1), Anax, hardened in the forge (1) and Tajuru Blightblade (1) Lukka Coppercoat Outcast, Swarm (for a total of 2). To be honest can't remember what I removed.
Life skills: Added a second Baneslayer Angel and Griffin Aerie (for a total of 3)
Switched basic lands for snow lands just because they look cooler.
Personally I liked the initial grind to unlock the dual color decks. Right now I play the colors that the daily quests need on Ranked just for fun.
Yes, I get to lose but I don't particularly care. If I did I would exchange some of the wildcards I currently have: Mythic (13), Rare (29), Uncommon (72) and Common (58). I just don't find joy in copying decks in the first places on meta just for the sake of always winning using the same cheap shots (Urgin, et al).
I like being able to quickly play a match to add on to the daily grind but I'm not deep into the meta game. I'm subbed to the Arena subreddit and that's it.
Even the best decks tend to lose quite a few times. You can check the best places in the meta rankings. I've played against pretty good decks and I can tell the other players are frustrated but hey, it's just the nature of the game. When luck is involved you can always lose against a better draw.