The more you can make that value visible, and make the negotiation pivot around it, the stronger your position will be. We'll see what the future brings. They will understand. And, if they don't, perhaps you consider moving on to a brighter and more generous group. Don't buy into it.
Unnoticed work goes unrewarded.
Rather than continue to be taken for granted, you can deliberately jostle their awareness. When discussing salary, bring benchmarks to show what others in your position in your industry are earning. Use comparisons, studies, and surveys to help make your point. Don't let the opposition make all the rules. You make rules more favorable to your position.