Welcome to making money as a software developer. Your experience is nothing exceptional in IT, most startups are pretty bad if you ask me. You can be more picky with companies, but that will make it tricky to find a new job in time.

My advice for your next job: don't mention any of the bad things you've experienced, talk about all the good things you've learned, the great team you had etc.. always remain positive in every new interview. And don't expect a great developer experience when you enter a new company, (although it sometimes happens), you work for money in the first place, and coding is your skill.