If you are a co-founder, and you are being side-lined, and you have no recourse to get back into the driving seat, it is time to go. This can happen if the othe

If you are a co-founder, and you are being side-lined, and you have no recourse to get back into the driving seat, it is time to go. This can happen if the other founder secured the funds and has the support from the board. Your only reason to be a founder/co-founder is to be on the driving seat - otherwise why bother with all the downsides of being in a startup?