No.. Everybody needs to stop suggesting adding fish and stuff to take care of problems that have a root with our habits.
If you have snails you like, an assassin snail is out of the question as well.
You have an issue with how much you feed.
Depending on how many shrimp you have, you may not need to feed nearly as much as you do.
See with ramshorns, you can use them as great markers of how much you feed.
Feed too much, you'll see explosions of them.
Feed too little, a die off.
Feed just right? They'll get a few to survive to adulthood.