creative works like these, especially level design, just take a really long time to finish. even the smallest of maps are a massive undertaking.
let's say you're playing super mario maker. you're not a huge fan of the auto-tiler or the lack of decoration options, you find them massively restrictive, but you have to admit they're making the process a lot faster. despite this, even making a single level can take hours to days depending on complexity. now let's say you're playing minecraft. the game is 3D, has plenty of decoration options, and changing even two tiles at once requires modding or slow commands. chances are your map is going to be more the length of a short game rather than a single level, too.
that was a lot of completely unnecessary words for what i wanted to say, but basically, unless you're spending multiple weeks at a time procrastinating, you're probably doing better than you think you are
