You described many of reasons I left a previous company. As one of the higher level engineers, I was constantly writing "tech specs", reviewing tech specs, doing code reviews (one week I had 12), and forced to present slide decks full of fluff against my will. Usually I'd push the slide shows off for a few weeks, but eventually I'd run out of excuses. Occasionally, I'd get to do some real work, but it mostly involved refactoring an almost decade old smoldering dumpster fire, so I left.