The topic of loyalty is a complicated one.
It has an excess, a deficit and a mean.
As a starting point, loyalty would appear to be a virtue. However, if one is loyal to everyone then the term has no meaning, Further if one is loyal to everyone because one does not want to offend or if one wants to perpetuate and/or extend one's network then it is an excess. Under those circumstances, the term loses its meaning.
On the deficit side: if one is loyal to no one ("trust no one") or if one is only loyal to those who are useful, or pleasurable, then it is a deficient state. Loyalty, that cannot sustain discordance, is also a weak state.
The mean lies in weathering experiences but also having limits to what one can endure. That testing and its ramifications would be the mean.