Heat the chicken broth, water and beer in a pot over medium heat. Add the polenta and cook over a low simmer, stirring occasionally, until creamy. About 30 minutes. Stir in the butter and cheese, add salt and pepper to taste.
While the polenta is cooking, make the shrimp.
In a small bowl stir together the chili powder, garlic powder, onion powder, red chili flavors, smoked paprika and salt, set aside.
Melt the 2 tablespoons of butter in a skillet over medium high heat. Add the garlic and stir until fragrant, about 30 seconds. Stir in the beer.
Add the shrimp, sprinkle with seasonings.
Cook the shrimp until pink, remove from heat.
In a small bowl stir together the crema and lime.
Plate the polenta, top with shrimp and avocado slices, drizzle with crema.