Character is all jittery glitch and control bug: HELP!

As the title says, something really weird is going on with my character. All my character controls seem perfectly fine.

Here is a link to my file: If someone could help me fix the problem or do it themselves. I'm willing to venmo or paypal a small fee for helping me with this. I've been stuck for HOURS now and have no idea what is going on.

drive.google.com/file/d/1BFioyRM_NoVW9cUagCJHeAEEBellXNqQ/view

Please don't post the same question twice, remember you can always edit the previous one.

Here, try

https://mega.nz/file/x1wlmQiR#78uKp5BSovMpvDdXahF6IDm0x8t9EdSupgWurYh9G5s

You're AMAZING, thank you!!!