I got tired of drawing the picture I was working on.
I got bored of painting the water colour of the park near my house.
got tired や got bored で 飽きて完成できなかった、という意味にも取れますよ。
ーI got tired of drawing the picture I was working on.
「手がげていた絵を描くのに飽きた。」
got tired of ... で「…に飽きた・…するのに飽きた」
draw the picture で「(鉛筆やペンなどで)絵を書く」
work on で「手がける・取り組む」
ーI got bored of painting the water colour of the park near my house.
「家の近くの公園の水彩画を描くのに飽きた。」
got bored of ... で「…に飽きた・…するのに飽きた」
paint the water colour で「水彩画を(絵の具で)描く」
ご参考まで!