Fix Angular 20 + ASP.NET Web API 2 ERP Performance Issues (Post-Upgrade Slowdown) -- 3

We’re facing post-upgrade performance issues in our ERP system after updating to Angular 20.3.19 for the frontend and ASP.NET Web API 2 with .NET Framework 4.7.2 for the backend. Pages, data grids, and API response times are significantly slower than in the previous version... (Budget: $125 - $250 USD, Jobs: AngularJS, ASP.NET, C# Programming, JavaScript, MVC)