Are you mentally unstable? They are literally giving you free cards for simply login into the game, you did nothing at all and you're sitting there like a chump expecting to get Lava Golem...
Thats the problem, they give everyone "free stuff" so called "free cards" obtainable without effort by everyone are just trash, give us some p2w cards for free, staples, then we'll talk. Take look at KC rewards, bulk of "free" trash and you have to play P2W cards to get them lul.
Why is this bad? If this event never exist, you don't even get the "horrible" card nor the card you wish. There's nothing wrong with this event, you're wrong one for expecting too much.
And it's not like because I got another Guardian of Felgrand either ...
If I decided to spend my money on some pack for rng based reward, it's a risk I agreed to take.
But this? Giving random people exclusive reward like frlgrand or vennu for free, without having to do anything; while us stuck with useless N rarity cards, that is really unfair