The product is poorly optimized, development is more interested in making new things and putting off fixing old things so you get constant calls of the same things over and over. Many management shifts made it difficult to get what we needed when we needed. The customers are lazy and are just looking for someone to fix it for them rather than supporting them in finding the solution. If something goes wrong and you warn them they will still pass the blame onto you getting your management involved. You eventually get stuck and don't grow anymore, using one product day in day out doesn't expand your IT knowledge and doesn't help reach goals