Low audience growth from a terrible ad is better than nothing so yeah. Being able to sell stuff is a great skill to develop so you can grow your audience. The problem comes with actually putting yourself out there. If you're not charismatic and/or confident to some degree, it'll definitely be harder to advertise to those you wanna reach. It also greatly depends on who you're trying to advertise to whether it's a few friends or a whole community of strangers on the internet.
I'm not fond of trying to put my stuff out there, it's such a chore. Quite frankly, I don't especially wanna be super well-known or anything.. A small crowd is fine with me, but small crowds don't pay the bills. I gotta get myself out there. I don't find it humiliating so much as I feel like I'm annoying people with my product. Even if I take pride in knowing that somewhere out there is potentially huuuge audience who'll be able to latch on to my work, I think it'd still feel like I'm annoying people with something that's ultimately for me.
I think my best way of getting past all the negative thoughts is to just go in wherever I can, have some solid fake confidence, and expect absolutely nothing so I won't be disappointed by the lack of a turnout.