Good Widows are really frustrating to fight against that it is not even funny. The kind that can tell which direction you are coming from and also make headshots a majority of the time are the worst. You can try to spane against them but they are usually either protected early by teammates or thanks to the new grapple cooldown they can rotate a lot faster than counters can jump.
Bad Widows just can't kill and they just feed. You'll have to actually walk into their LOS to have them kill anything.