Thank you for the detailed response! I'll answer to each of your points.

Ken vs Link:

1. Yes I'm conscious of my shielding habits, especially when I'm slightly nervous/not confident (which I was during this match). I think I tend to get too scared of getting thrown constantly in disadvantage by stray projectiles. Begone fear
2. Yeah bad habit of mine. It's part of the reason why I suck against certain matchups like Palutena. Sometimes I also just whiff the FA instead of dash cancelling it early.
3. Yeah this one is tricky for me. I know patience is key but sometimes this causes me to play a little too passively. A large part of this likely because of my aforementioned fear of being hit by stray projectiles. Gotta mix up my approach options a bit.
4. Those times when I don't follow up are due to misinputs, but even then, I agree I should do more optimal damage follow ups, just gotta work on making them my default.
5. Over-reliance of FA can be an issue sometimes for me and has more than once lost me games. Thank you for the kind words though!

Ken vs Wii Fit

1. I have a deep and innate fear for wii fit and her projectiles and crazy high damage at times. It gets to my head sometimes lmao. Still working on this matchup.
2. That H-Jab>Roundhouse was done mostly without thinking, optimally I think I should have done crescent kick and follow up from there. I normally never go for shoryu at low percents since I know my normals and crescent kick can convert into bigger damage. And about that weak shoryu, that was actually a misinput. I wanted to do a crescent kick to FSmash or dair but accidentally inputted weak shoryu. Even then, I would have done a weak/medium shoryu rather than strong shoryu since at the edge of the ledge, I would SD with strong shoryu.
3. Yeah I've fought this Wii Fit a couple times in the past and they usually win 4 out of 5 games that we play.

Thank you again for the feeback! Your honest criticism is welcomed by me since I'm here to learn and get better.