The ratios here is okay: we have lower than average mana sources but the deck has an aggressive curve, and there are 2 notable ramp bombs Manaweft Sliver and Gemhide Sliver
Ultimately, The Pokmon Company wants you to pay to open more cards and get more customization options, not to mention that battles can be dominated by players willing to pay more
And to be honest, I just found it quite enjoyable to expand my collection continuously, and don't consider it to be monetised in an overly blatant way, nor disturbing in the way it's structured
Pokemon TCG Online , on the other hand, is only officially playable on tablets and desktop (both Windows and Mac), with support for smartphones inexplicably nowhere to be found even after all these years
you will not be disappointed for a second