Its not that simplistic.
The abuser can find their spouse attractive and still be abusive. It could be their attractiveness makes the person jealous, insecure and that makes them rage. They can think that the spouse is seeking the attention even if they are not, and uses that as the excuse for the abuse.
The abuser can say they "love" them and still be abusive. Its not an uncommon pattern for the abuser to hurt the spouse, then claim that they love them, but that the spouse is responsible for the abuse because of something they did, or didn't do. They use that as an excuse for their abusive behaviours.
In other words a person who wants to be abusive can find any excuse to be so, regardless of how good, kind, good looking, accommodating, or whatever their spouse may be.
The person can hate the spouse, with good reason and still not turn to abuse.
Its not as much about the person's spouse and their looks its about the person themselves. Some will be abusive and some would never resort to that.
There is rarely any real "logic" to the pattern of an abuser.