I understand your reluctancy, I had (and partly have) the same experience and feelings.
I'm with Webflow for a good half year now. Had to take a really deep plunge into it, before I actually started to get a grip on css, because that's what Webflow actually is: it builds upon common html and css knowledge. To be able to build something that diverges from the standard, you'll have to become familiar with how css works. But you'll learn, just don't give up.
I host elsewhere, and just export everything I make and upload it to my (or my customer's) host. In case Webflow would end its business (which to me seems very unlikely in the nearby future), that exported html and css is still on your host's server. In such case, you could (and I have tested this) use an external app like Pinegrow (which by itself is much less easy to grasp than Webflow!) to adapt everything to your wishes.
Hope this helps!