Some assaults are very difficult to complete solo for casual or new players, especially on low pop servers. The reason more established players do not complain about this, is they cheat and used 3rd party tools to complete them.
Suggestions to fix assaults, and make them less awful:
Azure Ailments:
https://www.bg-wiki.com/ffxi/Azure_Ailments
It's next to impossible for debuffs to land in this assault, since I119 gear. I suggest giving the player a massive -magic evasion stat when you talk to the npc so buffs can land easier.
Imperial Agent Rescue:
https://www.bg-wiki.com/ffxi/Imperial_Agent_Rescue
The monsters have low HP, and doing damage means they die so fast. Increase the monsters HP pool, and add far more monsters to the area. You end up having to stand there and spam dia on the monsters to feed it tp.
Lebros Supplies
https://www.bg-wiki.com/ffxi/Lebros_Supplies
The amount of food you get solo, and the number of trips makes this assault near impossible solo. Boost the amount of points per food, or just remove all low points foods so they are all 5, 7, or aoe foods.
Lost and Found
https://www.bg-wiki.com/ffxi/Lost_and_Found
This assault is near impossible to solo, the ??? is too hard to find because it disappears so quickly and was designed for more than 1 player to triangulate the ring. Make the ??? always active and visible, instead of it being invisible.
The level cap raised, but many of these assaults are almost impossible still because they were designed to be done with more than one player. Changes need to be made to these, when they are so important for mythic weapons. Them being the way they are just encourages cheating.
Any developer or community manager should try these assaults solo and see how you go, they are near impossible to the point of being broken. Please fix them.
I'm not asking this for myself, I have numerous characters so can easily complete them all. Solo / new players players cannot, this is effectively broken content in many ways that was never updated with how the game changed when trusts / 119 was added.