With its own IPs? Half the games you’ve listed are games they bought and were already available or basically completed before they did, putting Microsoft’s contribution at almost zero. So starfield’s success, for example, is no more Microsoft’s than the failure of Redfall. They just happened to buy them. The rest of the games you mentioned have had mixed receptions at best. Fallout 76, are you serious? Starfield is better than that, despite being a significant disappointment (I’m 30 hours in, fuck you Todd), and both of them were acquired through Microsoft’s purchase of Bethesda.

What new things have MS tried?

You want to give them to a company that keeps fumbling its own IPs?