2. Lack of communication
7. Behaving Superior
Talking down to a partner is just another way of making yourself bigger or more powerful than them, and a power imbalance is the last thing you want in a lasting, healthy relationship. It hurts the self esteem of other person which can be very damaging for a relationship.
Even without actual cheating, just the suspicion that it's always happening can be very damaging to the relationship. Manipulation often starts as subtle, and you don't realize you're manipulating or being manipulated until it's way too late. There can be a gradual loss of self esteem during the relationship through a process of manipulation by the other partner.
9. Withholding Affection
Whether affection means being really lovey-dovey, or having intense discussions about meaningful things, or helping each other through daily chores, being absent and neglecting the partner can cause the kind of doubts in a relationship that end up being irreparable.