It's easy to add objects, fields, and declarative automation like workflow rules and Process Builder processes, but sometimes 'easy to create' means 'hard to use.' Too many required fields, too many ways to do things, old customizations that no longer fit business requirements. These can all confuse, slow down and frustrate users.
Snowytree LLC is experienced in reducing the complexity of Salesforce orgs. We follow Salesforce's recommended way to safely remove Salesforce customizations, a five-step process of research, communicate, restrict, monitor then decommission.
A start to understanding the complexity of your org is to run the built-in Optimizer tool.