Value - The property (carrier/car rental outfit) knows more about you than you know about you. Don't bother telling them about how much you spend or your status. They know whether you control your organization's spend or simply stay where you are booked. So, stick to the facts they don't know.

Loaded terms - "Lie", "Rude" and the like require qualification. If you use them, explain exactly what you mean. When you ask for a freebie 3-bedroom suite upgrade suite and the front desk says no, that is not rude.

Culture - It may be OK to be rude in the US, but in some countries it is not. Once the tone of your note takes a rude tone, you are done. It does not matter who you are.

Threats - If you are going to sue if the property does not send you $1 Million, then say so. Otherwise, don't say so. When you threaten to jump ship, why waste more time?

Realism - Comping 10 days of a $900/night room because a light bulb was not replaced is a bit over the top.