Here are some common irony techniques, which are essentially rhetorical tools that can be used to express dissatisfaction or doubt about something or a subject. It should be noted that when using irony, it is often easy for the other party to feel that it is a personal attack or malicious slander, so when expressing dissatisfaction, it is best to ensure that your arguments are sufficient and your words are well-founded, and also pay attention to legal and moral boundaries. Here are some techniques and ideas that can be considered: 1. Irony Use a sentence that is exactly the opposite of the actual situation to express your point of view. For example, when the other party promotes "ultimate service", you can write: "Sure enough, their service has reached the 'ultimate' - the extreme makes people wait, and the extreme disappoints people." 2. Hyperbole Use deliberate exaggeration to highlight the absurdity of a problem. For example, you can describe their response speed like this: "If they can reply to emails before the sun sets, then maybe I can use pigeons to deliver messages." 3. Parody/Satirical Imitation By imitating their slogans or official statements, but adding obvious irony. For example: "Welcome to the 'Service Kingdom', where our promises are never fulfilled, but please rest assured that we will professionally deliver your disappointment." 4. Rhetorical Questions Use rhetorical questions to let readers experience the absurdity for themselves, such as: "Should we be grateful that we can still contact real customer service?" or "Is this the true meaning of their so-called '24-hour' service?" 5. Contrast and Juxtaposition Contrast the supplier's service with an ideal state or completely unrelated things to highlight its shortcomings. For example: "Their service is like a high-speed train... except that this train always stops at the starting point." 6. Double Entendre and Metaphor Use puns or metaphors to give language multiple meanings. For example: "Under the promise of 'speedy response', I began to wonder who is providing me with a 'customized' waiting service." All of the above techniques belong to the art of rhetoric. The key lies in how to control the strength and scale of expression. It is recommended to stick to the facts when writing, and cite specific cases to make your satire and criticism more convincing, rather than just empty word games. This will not only convey your dissatisfaction, but also let readers understand the essence of the problem, which is more likely to trigger effective discussion.