Is the grass always greener?

Working for a gov agency with benefits + pension, less than 90k/yr. 3 YoE, and have this extreme desire to find another company? I feel undervalued, bored, and lacking mentorship from more experienced devs. No one on my team gives feedback on my code, I built out our entire testing framework cause there was no initiative before me to do so, the work is not as close to software engineering as I want. That said, it's laid back, slow moving, hybrid, and I get a lot of praise for my work (which I think is due to a lack of comparisons). Is the grass always greener at other companies? I don't want to work FAANG (turned down the jungle with 150k offer after an internship, as large monolithic corporations are not my desire).