With new cards added every month, Duel Links' metagame is constantly changing, having gone from a slow game to often just as fast as the Yu-Gi-Oh
Thats the thing: it changes based on the ATK rating of the tributed monster used to summon Garzett
While some people will leave Group Slug decks alone for most of the game because they enjoy the wild card antics, others really hate the way that Slug forces the issue of aggressive progress and will try to kill them ASAP
Additionally, at the start of your upkeep, if you control 20 or more Artifacts, you win the game
The repeated Heat Shimmer mode is also very expensive, and its only good with specific creatures with enters abilities or huge threats
If something feels off, it likely is