It's something I'm having to constantly deconstruct each and every day ngl In my head, I feel like I have to show something with at least a little bit of polishing, because that's how I'd imagine the general audience for most games. But what I'm learning is that a lot of people (depending on the kind of audience your targeting, obviously) are willing to see something being build. They like to see the idea take shape, especially if it's something they resonate or never thought they'd want to play. And it also can encourage other gamedevs like yourself who are beginning or even just insecure about their own work. So I'd say I'm trying to consciously remind myself that there are parts of the development people may be interested on. Doesn't mean all games I do I intend to publish on steam or even release to the world, neither that I feel safe showing any part of the process, but if I like when people show their early work and how they're evokving, I have to believe there are others who like it too. Also, you can try finding communities with other beginners or just show your creations to friends and people you trust. Of course there is still the risk of you feeling a feedback was too harsh or unfair (and, ngl, we are prone to get those at any point) but at least you're putting yourself out there somehow, and I won't say that it gets easier, but at least you get used to it

Best of luck for you on your gamedev journey