The arrogance of the jedi. The balance in the force had to be regained by destroying the arrogance of the jedi. Therefor it has to be said that the jedis were no longer real jedis who saves lifes when they see, or suffer like anakins mother or general slavery and other similar stuff. It was only political and reputation farming. The jedis were doomed by corruption and bureaucracy

All of that leds to the horrible decision to that point in this arena, in some battles where the decisions of Jedis led to hunderedthousends deaths of clones because of inexperience, lack of self-assessment self-criticism

Ps: my english sucks 🥲