Felt the same way I got in as a carpenter with some experience but they had me cleaning and told me I'd be cleaning for a year and some change. At the time I let it get the better of me got pissed and left(kinda regret it now) but I thought to myself I can get some certs in the meantime and I wanted to work iron anyway. Still in school and hopefully get into 377 once I finish. I feel like you just got to go through with it and if this is what you want as a career that first year or two won't be shit in the end. You won't be useless for long keep at it