Do you consider Angular to have a better rendering system? Or is it similar to React?

Asking because I use Angular and want to learn other frameworks in case Angular is just as bad for long term.

I analyzed all the major frameworks years ago and went with Svelte when svelte 5 came out. It is all I use now, the development team is highly responsive and cooperative with the community, the founder Rich Harris has a pragmatic approach and tries to keep it as compatible with html/js while still providing great DX and massive efficiency. It natively supports serverside rendering that turns into a SPA once it hits the browser.

Angular is probably more efficient than react but The DX is going to be worse than svelte or vue.

If you want the fastest apps in environments with low ping then use Qwik.

If you want the best overall experience, great customizability, compatability with any js package, great efficiency in most situations, and a great developer experience just go with Svelte (or vue maybe).

Angular might be fine, I don't know. I never used it extensively. But I do know that svelte is the only framework that I like using now.

Angular uses directives for rendering, that allows compilers to optimize rendering.

React model uses plain JavaScript expressions which are harder to optimize.

Do some research, experiment. Make up your own mind.