You might not like Axl's voice or him as a person, but he (still) has an impressive range if high-octane shrieking is your thing. And with the Young family business, you're not allowed to do anything else as the singer.
Axl sings notes here that Brian hasn't been able to sing in a long time.
I can take Axl in measured doses only but he does what he does well. All those high school years of religiously singing along with Dan McCafferty to Nazareth tracks sure left their mark.
Plus some Janis Joplin (even her moves!):
Axl was an industrious student - that pays in later life as his current job shows.