When at a deficit, playing lame and stalling ISN'T a bad strategy. People like to think I'm being an ass if I start stalling, but I do it because it helps wear down my opponent's mental stamina and lets me figure out my opponent's habits. I've made many comebacks doing this

A lot of characters have movement options, range, or projectiles to make up for it (zss, samus, cloud, etc)
Those who dont are typically designed to be aggressive and mash (mario, roy, ryu)
In scenarios where u are a masher, platform camping or keeping center stage helps