I developed a web project which is a web service that helps pupils and abiturients to find the most appropriate university based on their needs, grades, preferences. The tech stack is using AngularJS + PHP
It has unique content, about 7000 pages in search engines but only 5-10 people visit the website daily. I believe the main issue is AngularJS, it was designed to develop one-page web applications rather information web services. Even though I am happy with the performance and functionality of the project and I feed search engines with prerendered pages, AngularJS is still not SEO friendly and search engines lower positions because of users behaviour. For example, WordPress, Joomla websites are picked by search engines up much better but it lacks of flexibility developing new functionality
Could you please advise what is the best way to make website more SEO friendly? Update it to Angular 6? Replaced it with PHP + JavaScript?