The Microsoft store would have needed proper vetting and support for normal desktop apps from day 1 for it to actually have been a good option. Also, not requiring the system be set up with an online account would have been helpful for adoption.
I can't say it would have guaranteed people would have liked it, just that those were needed for it to have a chance.
I think the Microsoft Store actually did not require the account, which is quite a unique feature across app stores. Whether that is actually relevant on an OS that now forces online accounts in other ways is questionable.
I can't say it would have guaranteed people would have liked it, just that those were needed for it to have a chance.