This is obviously not because they avoid them, but because most people think of the ENTJ as too career driven to be in long term relationships. Their dominant function, extraverted thinking, likes to create long term systems that work, and this applies to their relationships as well. And anyone who offers this type of relationship will often find themselves left behind. ENTJs dedicate their lives to goal achievement and self-development, and they expect their relationships to have the same focus. ENTJs are much more likely to do things for their partner than to express their feelings verbally. And they will probably expect the same in return.
INFJ Relationships, Love & Compatibility
Rarest Myers Briggs Personality Types - aalvik.info
Remember that even two ENTJs can have very different opinions and values. They have the same perceiving functions Ni, Se and opposite judging functions Te-Fe, Fi-Ti , so we could say they see the world with the same eyes but interpret it and deal with it quite differently. While this can be interesting at the start of the relationship, it can get frustrating when both types start to resist being influenced by each other. If these two types want to have a good relationship they both need to grow a lot, which is not necessarily a bad thing, especially for two intuitive types who are keen on growth in all aspects of life. Seeing as they are both J, things in this relationship would be settled, decided fast and well planned. While this is certainly desirable from a Js perspective, they would have to consciously introduce some spontaneity into their life. As this article was written mostly from a romance-marriage perspective I should add that a friendship between ENFJs and ENTJs is usually a lot easier because there isn't so much obligation and mutual decision making involved.
ENTJ: The Commander (Extraverted, Intuitive, Thinking, Judging)
They are professionally demanding and persistent. Can they be friends? Can two such bold personalities succeed in having a romance or even a marriage? When making decisions, for example, the ENTJ sees the big picture and is open to the wildest of ideas to find an answer. The ESTJ, on the other hand, values facts, details and precedent.
This, according to MBTI theorists is an important factor in support of clear communication and compatibility potential. The more function-based distinction is that where ENTJ likes to develop their ideas and plans into action for the purpose of getting real-world results and rewards, INTPs tend to spend more time exploring options and possibilities indefinitely and may continue to do so for its own sake rather than for any external purpose. INTPs are driven more by a desire to build their knowledge and understanding than by a desire to build something tangible and palpable in the outside world. This penchant for prolonged decision-making can come across as slowness and laziness in the eyes of an ENTJ and irritate them.