There are those in this world who love rebellion - whether against God or against "the man." These people, because of this rebellious bent, also love strife. Theiy love a good fight where they can quarrel with others and contend with anyone who holds an opinion other than theirs. This kind of insolent, arrogant attitude brings such a one into multiple situations where they fight and where violence is almost certainly to break out eventually. I remember a friend of my youth - who just loved to fight, whether it was with words or fists. This happened weekend after weekend as he would drink and party. One weekend he went too far and was shot a couple of times at a bar where he had previously picked another fight. Fortunately for him he was not killed in the incident. But this is what the proverb is trying to get us to see.
The second part of the proverb here is a Hebraism. It speaks of the one who "raises his door." The habit of the Jews was to make the front door of their compound very low to the ground so that no one could get in without permission. They also would intentionally not make their doors ornate - so as to draw attention to themselves - and unintentionally draw the attention of thieves or those who would seek to plunder their homes and compounds. Over time this practice eventually came to speak of someone who was ostentatious and filled with pride. Those to "raise their door" came to mean those who act with excessive pride and arrogance. We are warned that doing this is dangerous and destructive. When we live with such excessive pride and arrogance - even one that fights with everyone - and that loves sin - we are setting ourselves up for destruction.
The wise man is a peace-maker, not a fighter. He is one who loves righteousness, peace, and humility. True, these things will not make him stick out - won't make him noticed by the standards of men. Yet, for the believer, this is not a good thing - to try to be noticed by men. We want God to be the One who promotes and gives us favor with others. The favor we crave and desire is not that of men (which often means we will have to love sinning as they do). We crave with an ever-increasing intensity the favor of God! And that kind of promotion does not draw the attention of men unduly - as does arrogant self-promotion does.