How common is a ‘multiple charmander / charizard’ deck in TCG Live?

Relatively new player here.

In about one-third to one-half of the TCG Live ranked battles I’ve played this week, I’ve seen the following human deck setup:

• multiple charmanders (3-4 in play)
• lots of fire energy cards
• trainer cards to select evolved cards (I.e. charizard)
• then they quickly evolve 1-2 to chatizard, who destroys my deck.

It’s a clever strategy, but I’m surprised by ‘how often’ I’ve seen it.

I’ve changed my deck to include a couple of water-types (an early-game attempt to beat charmander and charmelian), plus a leaf-type Ogerpon (a late-game attempt to beat charizards) - but it’s not working great.

QUESTION - how common is this as a deck in TCG Online? Is this oncersation a surprise, or is it a well-known beginner ‘meta’ strategy?

Thanks!