There are several factors that can instantly ruin a hamburger for me, ranging from the quality of ingredients to the cooking technique used. Here is a detailed answer with examples and references:

1. Overcooking: One of the biggest culprits that can ruin a hamburger is overcooking. When a patty is cooked for too long, it becomes dry, tough, and loses its juiciness. The ideal cooking temperature for a hamburger is around 160°F (71°C) for a medium doneness, ensuring a juicy and flavorful bite. Anything beyond that can ruin the texture and taste. For instance, if a patty is cooked until it's well-done or charred, it can become excessively dry and unappetizing.

2. Low-quality meat: The quality of meat used in a hamburger is crucial. Using low-grade or poorly sourced meat can result in a lack of flavor, texture, and overall enjoyment. A good hamburger should be made from high-quality ground beef, preferably with a decent fat content (around 15-20%). Lean meat can lead to a dry and tasteless patty. Additionally, using processed or frozen patties can also negatively impact the flavor and texture.

3. Lack of seasoning: A hamburger patty that lacks proper seasoning can be quite bland and unappetizing. Seasoning the meat with salt, pepper, and other spices enhances its taste and elevates the overall flavor profile. However, it's essential to strike the right balance, as over-seasoning can overpower the natural taste of the meat.

4. Inadequate toppings: Toppings play a significant role in enhancing the overall taste and texture of a hamburger. If the toppings are poorly chosen or not fresh, they can ruin the experience. For example, using wilted lettuce, flavorless tomatoes, or overly processed cheese can negatively impact the flavor and texture of the burger.

5. Soggy bun: The choice of bun is crucial in a hamburger. A bun that is too soft or lacks structure can become soggy when combined with the patty and toppings. This can result in a messy and unappetizing eating experience. A good bun should have a slightly firm texture that can hold up against the juiciness of the patty and condiments.

6. Poor assembly: The way a hamburger is assembled can also affect the overall experience. If the ingredients are haphazardly placed or unevenly distributed, it can lead to inconsistent bites and an unsatisfying eating experience. Each bite should ideally have a balanced combination of patty, toppings, and condiments.

In conclusion, a combination of factors can instantly ruin a hamburger, including overcooking, low-quality meat, lack of seasoning, inadequate toppings, a soggy bun, and poor assembly. To enjoy a delicious hamburger, it's essential to use high-quality ingredients, cook the patty to the right doneness, season it well, choose fresh and flavorful toppings, and assemble the burger carefully.