I’ve found myself in a similar position. I’ve often wondered whether the cause is one specific thing (eg my ideas seem small / less impactful than other projects I’ve worked on), or the culmination of several things.

I suspect in my case it’s a combination, but with a big dose of “been there, done that”. There’s only so many times you can get excited about a new tool or optimization.

The answer is, of course, to dive into something that isn’t tech. There’ll be a host of problems that seem/are fresh and interesting.