My Dev team are using Angular as a front-end framework, and ASP.net as a back-end framework and they had to use Devextreme and Devexpress as libraries or something ( please correct me if I'm wrong ), so the issue here is that my designs can not be implemented or as they say it's hard and it takes time to customize the code on Devextreme! So what I'm asking is there any way to customize the Devextreme code, therefore to implement a professional_ kinda complicated too_ UI design ?

Thank you very much in advance !