Hm, no, not really. Its utterely satisfying to win a bad matchup. As far as ranked goes, at least. Done it several times in casual while experimenting for sure.
As far as annoyance go - well, many people here mentioned mill NG.
Used to hate playing against it, later found the matchup somewhat interesting, even while WR against it is somewhere around 30% for my main deck (lots of thinning vs mill is not a good plan).
Still, game becomes something like a poker, where you try to read your opponent and pass when you've set enough power for yourself and weather for him, but before he gets those big plays like Vilgeforce or Tibor. While i find it amusing, it isnt Gwent. It might be a good game, just a different one. This is not what this game is about, and this mechanic doesnt belong here.
Some weather complains as well. I find it hard to see weather as a problem by itself. Woodland spirit is problematic because of tempo he gets. (Foglet/New Harpy trouble).
Gold weather, again, is fine by itself.
It is problematic because you allways spread your units around due to fear of Merigolds Hailstorm, pretty much assuring maximum value of it.
Then again, if one silver card is so powerfull the very idea of your opponent having it forces your positioning - something is probably wrong with this card.