To make sure we´re on the same page, Elementor is a page builder not a theme.
Now, not quite sure if you´re looking to switch page builder or looking for a new theme but let´s touch on both. But if you say "you don´t like Elementor" there isn´t an easier way out there to build/customize a website. Elementor offers by far the easier and more user-friendly UI to build and customize beautiful and functional websites.
But, if you want to "test the waters" with something else, go check Bricks Builders.
Now, when it comes to themes the best choices on the market that offer the best balance between loading speed/performance and features/functionalities are GeneratePress+GenerateBlocks and or the Kadence themes +Kadence Blocks.
Finally, I am going to say that there´s a clear trend right now that users are moving/migrating to a "block based" theme/builders and/or moving away from page builders like Elementor.
So, if you´re willing to invest the time on learning your ways using GeneratePress+GenerateBlocks I can recommend a few resources that will turn you into a master.
I hope this helps, cheers!