Yes, when you finish todos you have more new todos. That's the nature of life, it has nothing to do with the todos. If you don't feel like doing stuff, then don't. If you do, use lists. Todo lists are positive because they also contain the (usually invisible, but you can typically show them in most todo list software) list of completed tasks and over time that list will get impressively long, much longer than the one of stuff still to do.

People that are hard to motivate will be hard to motivate whatever tool or gimmick you use. Don't blame the tool for that.