zz'rot portal needs nerfing

It's pretty simple... zz'rot is toxic as it is currently. I had a Poppy last night just put the zz'rot portal behind the turret but still in its attack range, making it basically impossible to get to and kill without putting yourself at major risk.

The main problem is that the voidspawns are invincible when they first spawn, they spawn ENTIRELY too fast, AND they ignore champions as far as I can tell, so while this portal keeps spawning these little voids, they're crashing into my wave and making it impossible for me to push my wave into turret to kill the dang thing. Like literally my wave of 10 minions takes 2 steps max before another voidspawn is in their face keeping them from making any progress.

I always thought zz'rot was to keep presence in a lane that you didn't plan to stay in or something like that - not portal behind turret makes single man push nearly impossible. Like the worst thing is they keep the first minion in the wave RIGHT at the edge of the turret range permanently, meaning each minion dies before they get a chance to do any damage to the turret for the most part. It's VERY annoying.

I'm not saying get rid of the item (even though I definitely wouldn't miss it), but in order for it to be a non-douche item you have to take away the invincibility frames (problems with new collision and getting them stuck in the portal?), make them spawn less often (they shouldn't be able to keep any wave from crashing into turret, much less a big one), nerf the distance (maybe less necessary if the spawn speed is reduced), or make it so they can't be put in turret kill range. It's just really dumb that someone can drop that and make their lane that much harder to conquer.

That's it for now. How do you guys feel about zz'rots power right now?