I am not understanding the problem:

Relic= upgradable weapon, you work on at a casual pace (solo) that grows with you over time. It was (at least for now) not intended to be 'BiS' but rather, a good steady-eddie weapon that you could rely upon to fill in the gaps while in-between weapons and/or if the RNGeus was bad to you for a couple months.

Top-tier Raid drop (ala atm coil)=BiS weapons, but requires skill, teamwork and RNG to get. Also, only BiS for a limited time...once the next 'endgame raid' is out, this weapon is replaced. And since, the majority of players aren't clearing this content on the cutting edge of patches, by the time most people earn their weapon/gears from these dungeons, they actually are no longer BiS but 'secondary' role weapons.

So yeah, for an 'endgame raider' The relic is less your cup of tea, in that you likely will have something better to use at least until the next upgrade or two of the relic storyline. Still, it's likely worth your time to work on the relic, and keep it updated (in a casual way) so that you have it for moments just like now in game where yes, there IS a better (BiS) weapon in game...but you don't posess it atm....and therefore, currently your best choice IS your Relic.

I guess I don't know why you are having an issue. Wouldn't you be more pissed off if the weapons requiring coil turn clears were worse than a Nexus?