To the Sects of this world, Meng Yu's feeling was, "You people are just troublemakers!"
There are many decent individuals, but as a group, they are a far cry from that.
You reason with them, they think you're too weak; you show your fists, and they wonder why you don't hit them; you beat them hard, and their attitude improves significantly, especially the harder you hit, the more submissive they become.
Take, for example, the big and small forces and families in Sleepless City.
The children of Golden Core and Foundation Establishment Elders in Eternal Night Palace aren't born as disciples of the palace. They have to go through various assessments and such before becoming members, so many of them end up starting families and businesses outside.
With these people, Meng Yu was quite reasonable, and then, lo and behold, a whole bunch of them thought Meng Yu was going to lose and used the Teleportation Array to flee?