Not sure why people have an idea that Ole did no training with the players. Do you guys even know that without adequate training, the players cannot be in any sort of condition to play a football match let alone win it?
Ole got this club 2nd and 3rd, europa league final and reached the semi finals of almost every cup competition during the 19/20 and 20/21 season. Just by those stats you can discern that the fitness and conditioning of the players were very good during those 2 seasons to play that many games. The players pressing and overall gameplay was quite good as well. He might not have won a trophy, but you cannot doubt how he has made the players competitive.
It is just a shame that this season has been beset with injuries, fitness issues and players taking a while to adapt plus mentality issues which caused topsy turvy performances during Ole's last days. Even with Rangnick's training methods, there were not much improvements which tells you the issues were beyond training methods and style of play.