Frankly, it sounds like you know what is needed but don't like it. If you could blast through coding and system design rounds, would you have already found a next role? It seems clear that you think so, and I personally agree.

You can think whatever you want of leetcode, and algorithm interviews, but that's the front door into tech jobs. If you don't have a back door available to you I think you probably have to bite the bullet and deal with them.