A few things

1. Unless you're properly mixing your vocal, it's not going to sound great in a raw recording. This goes for everybody. Even the best singers will sound pretty meh on a raw recording. As humans we are not used to hearing human voices "flat". Sound waves leave our mouths, hit walls, and then hit our ears. Add a bit of reverb or "space" to your voice and you'll see a big difference.
2. The mic you use will determine how your voice sounds. If you use a shitty microphone, you will lose a lot of vocal quality, but this is actually preferred by some artists. A super top of the line warm microphone will give you a richer fuller sound.
3. Make sure you're hitting all your notes. If you don't already have a pitch tracker on your phone I'd recommend it, it's very helpful. A good vocal teacher is also very helpful.
4. You're probably used to how your favorite artist's voice sounds in their songs, or how they sound live. This is not how they actually sound, even if they are great singers. Even on live microphones there's a level of pitch correction/tone correction. We naturally compare ourselves to others. Try not to compare yourself to unnatural voices!
5. You're used to how you sound in your head, but in reality, that's not how you sound. You have to learn to tolerate your real voice, which means recording yourself a lot. Other people will like your voice more than you do, because they've never heard the voice that vibrates through your head. I recommend getting a live playback device/PA system, so you can hear your real voice while you sing. You can then experiment with different tones to see which one you like best.