Well the original intent of relic weapon is to let people that doesn't raid to be able to get a weapon that is comparable to raid weapon.

The grind is real but for alexandrites, you have several ways to obtain it - a daily quest that gives a map - it can drop from FATEs - purchased using allied seals or getting map with soldiery.

For those that can play everyday, just doing the daily expert roulette quest would take 75 days - you can shorten that by spending soldiery or FATE grinds.

For those that cannot play everyday - perhaps just get the ilvl110 soldiery weapon for the time being or ilvl115 shiva weapon. They are good enough for even end game content.