Why most people give up after a dissatisfied service from those bots is the lengthy period it takes a live support agent to attend to customers. Some persons don't have that patience naturally either because of their busy schedule or the just don't find it funny refreshing their screens at intervals to see if an agent is live to attend to their complaints.
Having stand by live agents will limit all frustrations and inconveniences a gambler might face using an online casino. A live support should be active to take complaints at all times. Most casinos run shift so it becomes less stressful for their agents.
Imo, there's only so much a support system can do. As someone with experience as a support agent, you won't have access to the system to rectify problems yourself. However, you do have access to upper management to get clear response for customers.
As a player, it's very frustrating when you can't get your issues resolve because of too many back and forth or if the support team itself isn't that much helpful—that is, they have predetermined templates for questions which isn't robust enough to handle every customer issue even edgy ones.