Not all Evolve cranks have the same mounting. The older ones used two counter rotating bolts so it sounds as if you’ve got the newer set which will requite a crank puller, or the fitment of a self extracting bolt kit. The latter isn’t expensive.
I have to agree with Carbon337, mine died after eighteen months before the splines on the driveside arm wore out. You can eke more life out of them by grinding down the non-drive side axle so that the splines fit tighter but it’s really delaying the inevitable.
Silverfish? Forget it.
I’ve replaced mine with SLX on bike 1 and Truvativ Stylo on bike 2. The Stylos have a very similar crank interface, but have clocked up two years useage without any issue at all.