Why am I so bad at games like this?

After the news about the future of my fave game, I cant hide the fact I am saddened.

However, this made me reflect on the fact that, while I enjoy these types of game, I am just terrible at them.

I played TESL: legends for thousands of hours and never made legend. I have played Gwent for thousands of hours and the best rank I have managed is 4.

Admittedly I only ever play rank. When I do I either play casually one or two games a week, or a mammoth session when drinking alcohol.
I tend to net deck a fun/decent looking deck, (my homebrews usually lose me a lot of games).

I struggle with the meta, I try to familiarise myself with the decks that I come up against, the win cons etc. Yet, it seems I am very often matchmade against someone who has the antithesis of my deck. For example, if I realise a lot of decks are tokens, I'll go Keltuliss, but then I'm not matched against tokens, I go tokens and meet a Keltuliss deck. I am not complaining, just trying to convey my frustration (with terrible examples)

I ask myself is this the nature of this type of game, (bounce around rank to keep me engaged) but whenever I approach this idea it is treated as taboo, I am told to git gud. How do I break this pattern?

TL:DR I'm frustrated how bad I am at this type of game, how do I break this pattern?