It's not so much the composition bit as all the extraneous stuff like multitracking a thousand pristine sounding takes and mixing and mastering it all to fuck because it will sound "professional" and fit with all the professional sounding songs on the streaming platforms. It's boring and annoying and it's what beginner bedroom musicians think they have to do these days and I hate it.

The real solution of course is to go fuck that noise and record your songs in one take with your laptop microphone as god intended.

I don't think the problem is that it all sounds the same as much as it is that there is a tension in a lot of artists to decide where to aim on the spectrum from their own pure artistic vision to the most immediately marketable thing. It's easy to romanticize throwing your art into the void and praying that it resonates with just one other human soul, but if you're trying to be a professional then your ability to get food is resting on being able to find enough of an audience that you can get some kind of monetization. It can be a difficult balance to find depending on what kind of art you're driven to produce.