Everyone starts somewhere. There's always room for improvement, but I've heard much worse. You said in yesterday's Chit-Chat thread that you've been using UTAU since January 2018, right? I'd say you've made good progress.
...If you do want feedback, in your Connecting cover, the instrumental was in a different key from the vocals. It could be because of where you downloaded it, so I don't blame you for it. (And who knows? It might be only me. Supposedly, I hear things differently.)
It isn't so bad that the cover is painful to listen to, though. It actually sounds good despite the keys!
I don't mind accents! Gekiyaku isn't the type of UTAU I usually use, but I'll take a look. Thank you!