[Lio]

I'd suggest maybe trying either Solargraph[1] (which also works well for me) or a ctags based solution like ripper tags[2].

On the plus side, ruby-lsp is always being improved and worked on, so just like Ruby in general it's only getting better at what it does.

1. https://github.com/castwide/solargraph

2. https://github.com/tmm1/ripper-tags