Online isn't real.
If you filtered all of your opponents to 5 bars and these guys actually lived 1-2 hours away from you you might have a point.
Might.
When the difference between a hi-counter hold and dying is one frame it completely invalidates the whole thing.
Online is nothing but theory fighter, because you have to know the game deeply enough to recognize when the lag is getting in your way and not the match, and not let it affect you or your muscle memory- but of course it will affect you because you will naturally be drawn to options that lead to victory, which may be utterly useless offline. (This is why some people completely swear off online.)
Now don't think I'm being condescending to you or anything. I'm just being real.
I might point you to
this topic, where I asked for help, and the first response was "you're playing online".
And I pretty much had to confirm for myself my own question. (Making the topic itself useless...)
You wanna play online,
don't expect any help. Make best friends with that record/replay button, 'cause you'll be with him for a while.