This is going to be an unpopular opinion here, coming from a designer who already knows how trends works, but anyway I'm going to copy & paste part of my comment in Nadine's post:
A really good source of inspiration, that very few people think about are designs systems. AirBnB, Google Material, Atlassian, IBM, Spotify, {...}, you name it, already solved a huge amount of problems related to design, and the best part is that you have access to them! they are waiting for you to "hack them".
There is a book that I always recommend, A Primer of Visual Literacy, by Donis A. Dondis (La sintaxis de la imagen, in Spanish). The book is not the best about visual language, but is very easy to follow, and a really good introduction. Obviously there are books a lot better in that precise matter, but this one is a must-read for anyone doing anything visual. Trust me on this, there will be a before and after if you read and understand how human perception works, that would help you a lot in terms to take those decisions about colors, composition, and a lot more things that you probably never thought that matters in visual design.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
This is going to be an unpopular opinion here, coming from a designer who already knows how trends works, but anyway I'm going to copy & paste part of my comment in Nadine's post: