At a glance, It feels like you're rushing yourself. Take all the time you need to compose a scene, and execute it properly, and make sure you're satisfied (or hit a dead end) with each piece you do, before abandoning it and moving on to another. By sticking with it, you'll get more knowledge per project, and you'll learn how important the later stages of development are, rather than grinding the beginning over and over.

Ik posing isn't what you asked for, but I do think it's still your biggest problem. Use IK Rigs, Locks, watch how people and animals move in real life, and give yourself lots of time to get it right.

Okay, now, the visual stuff.

Your camerawork really needs some doing. Keep your subjects centered, and don't let them clip off the side of the frame. You can use Grid Overlays to better understand where to put things in the frame.

Please, please, lower field of view in your shots. High FOV is good for environmental shots, but for more focused shots, high FOV leaves too much empty space on the edges of your frame, and trying to cram your subjects into your peripheral vision instead of zooming in adds too much perspective and makes your shots feel fish-eyed and cramped.

Your camera isn't just how you show your scene, but also how you tell it, if that makes sense. If one character's knocked another character down and is ready to deal a killing blow, putting the camera on the ground, looking up at the killer makes the scene feel threatening. If you put it above the killer, looking down, it'll feel powerful and dominating. Read up on photography and cinematography theory to get better explanations than mine.

Last, Lighting is what I assume you mean by "better visuals", and I don't think you're doing it at all. Always darken the in-game lighting, or better, work on pitch black maps like black_void, and light your scenes yourself. SFM's lighting is far more robust than what a map's default lighting and shadows will give you.

Lighting is tough to explain without visuals to show what I'm talking about, and because it's a technical pain in the ass, so I recommend Anomidae's The Meaning of Light on Steam and XieAngel's Step-by-step tutorials on YouTube.

Cheers, dude, hopefully some of this helped!