I struggle with exactly the same problem; reading (and also playing the piano in my case) feels like a low value-generating activity. My time is more and more limited over the years, and I find myself needing to ruthlessly prioritize how I spend it. This has led to a constant re-evaluation of my values, and have roughly concluded (atm) that instead of reading, I should be sleeping, socializing with friends and family, exercising, outputting/hacking around for fun, or learning about something at work that can make my workweek easier. Or just decompressing cognitively, sometimes in the form of time-restricted TV/games.
Ultimately, after having read/listened to ~200 mostly non-fiction and fantasy books in the past several years, the ROI is non-zero but not that high relative to the other activities mentioned. I think this is partly a byproduct of the times and the culture I'm in (mid-career engineer in silicon valley), where priorities shift a lot towards career and financial successes. Personal output tied to network, skills, and work has a much larger influence on these priorities over a much shorter time frame than reading arbitrary books. If I lived somewhere else or didn't have money needs, I can see my priorities shifting more towards reading. It's not ideal, but I've come to accept this reality. Reading isn't something I have to do, nor is it always the most rewarding activity.
I try to still read every now and then, especially if there is a focused book aligned with my immediate interests, but I've also come to accept the fact that I may not finish a lot of books and that's okay.
I've also come to believe that most books have too many words for my taste given the relative paucity of ideas, and I'm under no obligation to read every word just because an author wrote it. I need to be my own editor of the content I consume; outsourcing this to the writers/publishers makes less and less sense. If I'm bored, I skip a chapter or three. Or I may read a synopsis online and if it is interesting, then I dive deeper. I have to prioritize how I read, not just how much I read. I actually find this makes the reading experience more enjoyable since I spend less time on the parts that feel "boring".
(I have the same attitude to TV/movies; some episodes are not a great use of my time so I scene skip and increase playback speeds).
I've also found myself listening to more audiobooks instead of reading. This is particularly helpful when I drive, do late-night stretches, or cook and it doesn't consume additional time.
I wish circumstances were different and I could just go outside in the shade of a tree and read all day, but at least at this point in my life letting go of the pressure to read definitely has had more stress-relieving effects than actually reading.