What you describe is often the scenario of do-everything consulting sweat shop building tailored or customized solution from scratch based on a single customer

What you describe is often the scenario of do-everything consulting sweat shop building tailored or customized solution from scratch based on a single customer requirements. Management often lacks business vision and technological path. Front sales and techical people are randomly assigned and switched between ad-hoc projects with varying industry domains and poor communication chanels. I think only debt slave or masochist stay in such places for longer. Age doesn't matter. I would rather look for more focused software product companies with stable teams.