You could of course sue Google, but that's an extremely expensive and time-consuming option, rarely worth it for a mere consumer. Going to court certainly won't make your suspended account become unsuspended any quicker.
Unless you've waived that right when you agreed to the Terms of Service.
Which would be meaningless in the EU (I think. Possibly just Germany) as you can’t waive that right.
For consumers or businesses? Not being nitpicky here: I am not familiar with the French ruling, so I would genuinely want to know - as regulations tend to differ (businesses, even single sole trader ones, do not enjoy consumer protections). Not really relevant for the Terraria dev as it is his personal account that is banned, from the sound of it - but important.