If I understand correctly, you're the one setting unrealistic deadlines for yourself. Underestimating the timeline for work is something I'm guilty of myself, e

If I understand correctly, you're the one setting unrealistic deadlines for yourself. Underestimating the timeline for work is something I'm guilty of myself, especially when I know the rough outline of what I need to do. If you were able to articulate the reasons why, could you just give yourself more room to work? Take your initial timeline and multiply it by 1.5. Sounds like your original timelines are rarely realistic anyway, so it seems honest enough to just make it arbitrarily bigger and see how that goes instead. If your larger timeline is accepted and you deliver well under that limit, everyone's happy! That's assuming that you are able to do so. If you've got managers breathing down your neck to get stuff done in unrealistic time.. that's a different situation.