From chatgpt
Fast-Forward to the End
If the "Remove" option is unavailable, an effective workaround is to fast-forward the movie or TV show to the end:
Go to the last episode of the last season and then fast forward to end
Apparently the only thing that works but a real pain especially if you watch a sporting event and don't finish it. Fast forwarding works but you have to sit there and wait for commercials to play before it lets you complete. Stupid. How about keeping Manage Series active all the time to delete stuff.
And here's a good one. I've had 2 items "stuck" on My Stuff/Sports since July with no way to delete them including running it out because there's no way to play them. I can delete them (seemingly) from the phone app but they disappear and then come back again. Contacted Hulu twice to report the crazy glitches in their programming and after lengthy sessions, only got vague promises to look into it and that they were high on the list of investigations. Right!