If that makes you satisfied, I am happy for you. For me however, the club is average, especially when you put the enormous spendings in relation to the results.
Mental. It's not like the spendings were made from money generated by stealing from orphans, drug trafficking and slavery. It's money made from being successful in football, so why would you hold it against the club?
You wouldn't call Microsoft an average business because a bunch of businesses performed better than Microsoft from an ROI perspective for a few years. So why would you do the same with United?