I would go with [Unarguably](https://www.merriam-webster.com/dictionary/unarguably) (or *inarguably*, depending on your personal preference).

> Your situation is unarguably more severe than mine.

Or, perhaps, [Unquestionably](https://www.merriam-webster.com/dictionary/unquestionably).

> Your situation is unquestionably more severe than mine.

I think I'd stick with unarguably, though; that sounds better to my ears.