To each their own. No sim is perfect, they all have flaws, each has their own niche. Msfs does civ aviation well, but I think il2 does warbirds and WW1 best- systems are better in DCS, but I think il2 has an overall better WW2 experience. I feel DCS does helos and modern fighters better than msfs could.
I honestly feel DCS keybinding/ control setup is heads and shoulders above msfs, but I’m sure there’s plenty who would disagree