If you have to complete something you are not motivated to do, it is best to do it as well as you are able the first time and to do so right away.
By procrastinating, you would only delay further the opportunity to be done with it.
By pouting about it, you would only lengthen the timespan of misery before you would again become happy to have it be done.
By worrying about it, you would exacerbate the depth of the misery before you would eventually get it done.
By doing it half-assed, you would only be taking additional time to first try to explain yourself and then to do it over again.
By doing it immediately as well as you can, you would simplify the experience and be done without all the unnecessary emotions, drama and delays.
“In character, in manner, in style, in all things, the supreme excellence is simplicity.” — Henry Wadsworth Longfellow —