No-one is remembering Ole with rose tinted specs, just stating the facts - we didn't do badly in the league and we reached a European final. Very few disagreed with him being sacked at the time, and if things had improved since then, Ole's tenure, whether good or bad, would be in the past...but things haven't improved, and are surely worse. When was the last time we had a run of both good results and good performances - we've had a run of results (seems a lifetime ago) but I don't remember the last time I watched United play consistently good football, let alone great football.
As for his signings - what manager would not have taken Ronaldo back? And Maguire was wanted by Mourinho the season before, and by most of the fans from what I remember.