I'm not famous like Jcaesar or Sudai, but I know quite a bit:
-------
Shield grab instead of jabbing or spot dodging (which you use way too much by the way).
Utilt destroys a lot of the cast from below and can chain pretty well.
If you're in UpB waiting for an opening to land, throw out an fair so you can AD if needed.
glidetoss back and laser
glidetoss down
You can grab release him into a gyro and smash.
Speed hug.
walk forward carefully and use ftilt. Try to powershield laser shots.
Ledge options: instead of always ledge hop fair'ing, you can...
- ledge hop AD
- ledge hop nair, laser, gyro, uair (if he's standing on top of you)
- Shadow is pretty known for mixing up his ledge hops with a shield-poking sideB every so often.
Sometimes, you can ledgejump (not hop) to fleeing UpB to Bair'ing him in the face if he chases.
About your gyro usage, against wolf, I usually see two ways to use your gyro efficiently. One is the one I see you using: just trying to have it somewhere on stage to disrupt his play. Don't always shoot it AT him though. Since you're letting it out for the sake of having a hitbox onstage, you looks like you're being very predictable about always shooting it if he sees you start charging. The other way is to charge it up to full and use it when he can't retaliate or doesn't expect it (i.e. when he's recovering or vulnerable from a laggy move).
Just for the wolf matchup: You probably know about his scarring right now (side-b'ing through the stage). Also, it's probably better overall not to chase him offstage unless it's a low percent bthrow offstage to fair chain gimp. Just stand onstage and bair where you think he'll appear.
------
Marth
Ftilt angled up marth. It destroys his short hops.
Use robo burner (tap b while you're in UpB). You conserve fuel and go farther.
Utilt and uair Marth. Marth has a weak spot below him just like you do. Marth and ROB can juggle each other pretty well. At 3:07, an utilt would have kept him in the air for more uairs.
Don't stay close to him. You should always be in ftilt range against Marth, never closer. Farther is okay, since you can camp.
You can pick up your gyro and z-drop it on the edge of the stage or just off the edge. It can mess with his recovery. Ex. at 3:23.
You keep getting hit by his fsmash as you come back onstage from the ledge. Ledge hop slightly backwards and laser or gyro to see if you can get a better opening. If that doesn't work, ledge jump AD is the best option. Marth's edgeguarding is beast if he's patient and reacts well. This marth doesn't ledgeguard you as well as he could have.
You can use c-stick to do aerials. Retreating fair is where ROB uses it most. You can move ROB out of retaliation range while putting that fair hitbox in front of you.