Friends can get offended because often they use their friends to represent themselves.
Best have trained out of this, and while negotiation with good friends is good, at the end you are you and they are them. No competition or you existence is not there to be opposite them though they can perceive it that way 0_0

A good friend makes time to tell their friend in space and time. A bad friend (in my book) doesn't make time and doesn't want to hear it (these people you can try with but don't throw yourself at their mercy).

Good friends know the limitations of the other(s) while accepting it if it's above a certain limit or even if 1 thing is great and the rest bad (using each other for the best bits or generally cool and casually able to hang out)