I don't think anyone should have to estimate damages for DMCA. Damages are not an issue, it's still your copyright.

Instead, this seems like a completely bullshit copyright claim. That's what the ideal fix should be.

There's zero incentive to not do DMCA takedown notices, what are the consequences of getting it wrong? It's a great tool to intimidate anyone doing something you don't like. Haier has a legal team, this developer has nobody.