The military has a term called "force multiplier". It means a factor or factors that gives existing people (or weapons) the ability to do greater things with these factors present, than without these factors. An easy example was the transition from horse Calvary to tank.

And then there is the force degrader....those factors that hinder and decrease output from persons and weapons. An easy example is a a very rough terrain.

An LVM is a classic force degrader to you! Just go over the Breaking mom sub Reddit for an example of this. The LVM hinders any efforts she makes and actually makes more work for her to do in regards to housework, financials, and childcare. Then you have the emotionally draining aspect of being with an LVM, like a program running in the background draining the unit of energy. This all means she is not the best she can be, and worse, she is actively depleted of her energy and strength because t hst LVM just hanging out and fucking shit up.