I have my portfolio on Squarespace as well. Once you start tweaking the template, you hit walls real quick. For most use cases it's not a problem, but for us designers unpolished details harm our reputation.

Another thing I find annoying is paying $16/mo for a site that I update maybe twice a year.

It's a famous problems for all designers we literally spend FIVE YEARS building new portfolio, because we want it "perfect", while the current one is terribly outdated and we hate since week 2 from launch :-) Makers.so could be an answer, it reminds me of Framer Sites which has similar value proposition.