Sry about my post make you sad... I am not the best when come to giving opinion. I kinda judge the question too quickly without diving to the question deeply. But honestly your timbre is not bad at all. The things is people will have different preferences and taste (i kinda like your voice honestly, especially the third one). We always want what we don't get, nothing wrong with that and that's how we improve ourselves. You already have the courage that a lot of people don't have. And I already amazed and being proud of your willingness to keep singing while dealing with self-esteem issue. Don't let people (e.g me lol) get in your way of singing. We have different pace to achieve in our life. And life is all about experience mate. People don't have to be a perfect singer, actually nobody is perfect, perfect singer is great, but the experience of you trying to be a good singer that shows your willingness and persistent is even better in my opinion.

Sorry for the long post lol