Theoretically, this is how I approach every game. In practice, I often will force myself to finish games if they are short (under 10 hours), and if they are longer it depends entirely on how story/single player focused the game is. However, I am really, really good at giving something a try, and even if I enjoy it a little and think I would play it more, the second I realize it isn't clicking or isn't for me, I just uninstall it and put it on a list of things to maybe come back to on the rainiest of rainy days (ie, hundreds of games deep in my backlog). I rarely play an open world game and give up on it - I either know I am going to like it 10 hours or whatever in and go all the way, or just stop and move on. The only recent exception to that is AC: Odyssey, which I played for maybe 50 hours and had to just stop. I had overdone it early on with sidequests and just didn't enjoy the basic loop enough to finish it, even though I was curious about the story.
Currently, I am kinda close to burning out on Ghost of Tsushima, after playing it very, very off and on since release - never really giving it enough time to make it the main thing I played, but also wasting way too much time on side stuff - I spent almost a full playthrough worth of time on the first area, and was incredibly burned out on it until a week ago when I finally got back into the main story stuff. There are a few character side missions left and then the third territory, but otherwise I forced myself to stop doing side content/? on the map as it was totally burning me out.
I love open world games - I would go so far as to say they are my favorite genre, even with very limited time - but if I don't learn to moderate/avoid/ease up on side content, especially early in those games, it is going to become progressively harder for me to play them.
Man I have so much to say about this topic I might come back for more tomorrow!