No, the fact that the universe is an open system does not imply that it is tending towards order. The increase of entropy in closed systems is a specific manifestation of the second law of thermodynamics, which states that the entropy of an isolated system tends to increase over time. However, the behavior of open systems, such as the universe, is more complex.
In open systems, energy and matter can be exchanged with their surroundings. While localized decreases in entropy are possible within an open system (such as the formation of ordered structures), these decreases are generally offset by increases in entropy elsewhere. The overall trend is still towards an increase in the total entropy of the system and its surroundings.
On cosmological scales, the universe is actually experiencing an increase in entropy over time. This is known as the "arrow of time" or the "thermodynamic arrow of time." The expansion of the universe, along with various astrophysical processes, leads to an increase in disorder and entropy over vast timescales.
So, while the universe may exhibit pockets of order or complexity in certain regions, the overall trend is towards an increase in entropy. This understanding is supported by observations and current scientific theories, such as the Big Bang theory and the concept of cosmic expansion.