Tell me about your bad experiences with agencies

As a social media marketing and content creation agency owner I always try to give our clients the best experience and outcome possible, but I have seen that some of them: 1. Don't have time for continuous meetings 2. Are kind of traumatized because of bad experiences in the past (not getting what they paid for) 3. Think that X amount of posting per week is a strategy I'm looking to solve that issue with a subscription based social media service, a flat fee, unlimited revisions, unlimited accounts and unlimited requests and branding in case they need it with a fast delivery rate (2-3 days) and having just one meeting at the beginning of each month. By doing this I'm giving the costumer exactly what the want but also what works with little time to lose and all curated by a team with more than 10 years of experience in digital marketing. What other problems have you found while working with social media agencies?