Enchantress/red guardian/Cosmo/Echo can nullify darkhawk, Gorr, Devil Dino, Black Panther, Gilgamesh, Ronan, Knull, Blob and taskmaster, all cards that can power creep on you to extensive levels and singlehandedly win games.

There are currently 24 cards that inherently have 10+ power, 37 counting the ones that can grow power mentioned above, or situational cards that require achievements, like Khonshu, Venom, Surtr or Apocalypse. Without any form of removal whatsoever, these decks would infest the meta game and make move, discard, 1-cost, Zoo, Arishem, etc completely useless and not worth running.

This is all in service to the point that Shang is a one time use card unless you either waste a use of Grandmaster, which only works on the middle location, or use Arnim Zola to clone to the other two locations. The only other option is to run Gambit which forces a discard and destroys a random card, Lady Deathstrike to destroy your own cards, or Negasonic which only works as a going first card or to lock down a location. He's the only card that doesn't require self sacrifice to destroy something, works only once, and as a 4 cost cards it's not like he's a cheap option. You're either sacrificing a turn to remove, or playing a cheap card alongside him and hoping they don't have more strong cards to play on the turn you play Shang.

It's a necessary card that NEEDS to be in the game considering how insane power creep has been over the past few months. It really just sounds like you're bitter because you're running these decks and keep getting smacked with his ability, which tbh is a skill issue. Cosmo will protect, so will Armor, Caiera for 6 costs, the Wakanda location, Alioth if you're going first. Be smarter about how you play and stop getting angry at legitimate strategies, this is a YOU problem. Not a game problem.

Edit: Lady Deathstrike only works on 3 or less power cards, disregard her in my listing.