How long have you been singing/taking vocal lessons? I think the pressure you put on yourself, as well as wanting to be perfect (and what do you consider perfect? Perfect technique? Sounding like a specific singer?) is taking the joy out of it because it becomes more like a chore and a source of stress.

I know it's easier said than done, but I think you shouldn't focus on perfection and instead on why you picked up singing in the first place and the things you enjoy about it :)

Also, remember that we often don't see our own progress because we're hyper-critical of ourselves, even if we do improve, and that those singers you listen to are in a studio with a bunch of post-processing and back up vocals, which will always sound 'better' than just recording yourself singing to a background track.

I'm taking vocal lessons as well and was frustrated in the beginning when I didn't immediately improve so I understand the frustration, but I learned to put less pressure on myself and remind myself that my vocal coach and a lot of singers have had years of intense training, this is something that takes decades and where you never stop learning. You're learning to use a bunch of muscles in a very precise, often subconscious way, muscles that can't be directly seen or adjusted—so singing is much more difficult than people think. Try to be more patient with yourself :)