I have this exact same problem most of the time. To which I usually respond, the only way to get better is to vs stronger opponents. They don't agree clearly =P
happens to me all the time. they're like: can't you find better competition?"
No. No I can't. Because every other lobby either has a shittier connection, shitter match settings (Tag mode, anyone?), or shitter players. You're as good as it gets at the time! haha