Many mushrooms are impotent, especially if picked very late or stored/dried improperly. The first shrooms I tried were lackluster and I got them from some shitty dude who overcharged for them. Barely even tripped.
All the most powerful mushrooms I've eaten, I grew myself. Picked before the veils broke. If I recall correctly, 2gs felt equivalent to about 125ug of acid. When I ate a smoothie with 3.5gs of the same batch (mixed dried/fresh) I had one of the most intense trips of my life.
And they are very gross. I hate shrooms for the very fact that I hate eating them. Fresh, they're a lot easier to down; easier to chew, taste better sorta, you can fold them in half and swallow whole. I only ever dried them if I planned to keep them longer than a week.