For Glory has a lot of rubbish players nowadays still, but rubbish players definitely aren't the norm nowadays like they were back in 2014-2015.
You're (mostly) gonna run into either decent players, people trying to show off or legit good players that are there just to pass time. But running into somebody that plays like a potato (and has connection pretty much as good as one) definitely still happens quite a bit.
For Wii U, I generally seem to run into the more okayish players, but I also never had good connection on Wii U For Glory. 3DS has very low lows when it comes to connectio nquality, but I also run into lagless or mostly lagless people generally frequently. I have insane amounts of buffer lag in nearly every match anyway.