Hi Loki-doki1,
welcome to the Apple (user-to-user) Community!
Re: "Automatic nonsensical subtitles : Anyone have an idea how to fix this?"
Seems that Psyflix would normally be the best way of obtaining support, so sorry your efforts were not rewarded.
Wondering which Mac app you use to view the videos ...
Seems there are various options, yet they may or may not work in your particular circumstance.
✽ Eg: If you use QuickTime player, that has a few options for subtites:
- In the QuickTime Player app
on your Mac. - Open a movie that has subtitles or captions, then do any of the following:
- View subtitles: Choose View > Subtitles, then choose a language. You can also click the Subtitles button
in the playback controls (or press and hold the Subtitles button in the Touch Bar) to see a list of available options. - View closed captions: Choose View > Show Closed Captioning
Above is from: QuickTime Player User Guide for Mac - Apple Support
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✽ Play web videos in Safari on Mac - Apple Support says you may be able to stream the video to a TV set ...
not sure if your TV may handle subtitles any differently.
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✽ Tip: If your Mac supports it, you can turn on live captioning of audio so you can follow along more easily with conversations, audio and video. (Live Captions is currently in beta. Live Captions is available only on Mac computers with Apple silicon, and is not available in all languages, countries or regions.)
See Use Live Captions.
Note: The first time you turn on Live Captions, language data is downloaded to your Mac.
You must be connected to the internet.
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✽ Else: you can try: Use subtitles and closed captions on Mac - Apple Support
or
Change Captions settings for accessibility on Mac - Apple Support
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✽ There are online sites that claim you can upload your video for subtitles to be added
I do not know how effective they are, or just what is involved:
Eg: Clideo / Kapwing / flixier
Also: Seems there are various "subtitle players" available for download:
Check first for compatibly with your Mac: Eg: Online review of some subtitle players
Have not used any online sites or subtitle players myself, so can not recommend any. It is "user-beware".
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All the best :-)