I've got this thing I drew using the brush tool that's suppose to be a panel for some project of mine and I'm trying to get some nice defined fillets to each hole:

[![enter image description here](https://i.stack.imgur.com/vs7z7.png)](https://i.stack.imgur.com/vs7z7.png)

What would be the easiest way to achieve it as efficiently as possible because I believe there are at least 100 corners there even if there's a way to select it and that's no task for a human.