I'm sorry to hear that your experience on the kayak tour was not what you had hoped for. It's understandable that you were disappointed in not seeing any wildlife, as that can be a major draw for many nature tours. However, it's important to keep in mind that wildlife sightings are never guaranteed and can be influenced by a variety of factors such as weather, time of day, and season.
As for the length of the tour, it's possible that the guide had planned for a longer route to ensure that participants had ample time to enjoy the natural surroundings and to maximize the chances of wildlife sightings. However, I understand that everyone has different preferences and endurance levels, and what may seem like a reasonable amount of time to one person may not be the case for another.
Regarding the value of the tour, it's important to consider the expertise and knowledge that the guide brings to the experience. A guide can provide valuable insights and information about the ecosystem, wildlife, and history of the area that may not be readily available on a map or through independent exploration. Additionally, the guide can help ensure safety and offer assistance in case of any issues that may arise during the tour.
Overall, while I understand your perspective, I would encourage you to consider the benefits of having a knowledgeable guide and the unpredictable nature of wildlife sightings. It's possible that with a different perspective and mindset, you may find more value in the experience in the future.