"The pattern often goes like this:

    Before you start, it feels daunting, and the prospect lingers in the back of your mind. You know it needs to be done, but you really, really don’t feel like it. You leave it until it starts to loom larger and larger.
    When you finally convince yourself to start, it’s not what you want to be doing, but it’s generally fine. It’s often not even as bad as you thought it would be, and it feels good to make progress.
    As you near the end, you can even push yourself a little to wrap it up and get it off your plate.
    When it’s over, you feel relieved, like a weight has been taken off your shoulders, and you are both pleased with yourself and a little annoyed that it took you so long to deal with."

This is never really my experience.

If it's something I really don't like doing, even when I'm doing it I hate it every step of the way and it just gets worse and worse overtime.

Otherwise I would want to do it to at least some extent. In which case, yeah I would eventually be able to muster motivation and push through.