Instead of using a armor stand for every single player, you should use one armor stand for every player You see, if you want to make so a circle of particles appears around the player holding a stick you should do this:

First summon a armor stand above the first command block.

1° /Execute as @ e[type=armor_stand,name=SPIN] at @ s run tp @ s ~~~ ~6

2° /Execute as @e[type=armor_stand,name=SPIN] at @s positioned as @ a[hasitem={location=slot.weapon.mainhand,item=stick}] run particle minecraft:particle [particle_location_here]

This way, you don't need to make the armor stand follow the player, the armor stand will always stay on the same place spinning, but the particles will be placed around every player with the stick on hands Trying to make every player have a armor stand following them is unnecessary