Is Ubersuggest reliable?

I'm new to SEO, and decided to use Ubersuggest to find keywords. However, I find that every time i search for keywords under "keyword ideas" it first gives me 3 month old data (already stupidly annoying), which I have to manually refresh. But when i refresh it to show me the data of today, it at least doubles the SEO difficulty every single time for the same keywords. So when I filter for easy SEO difficulty it gives me a bunch of options, making me think I found some good stuff, but its completely useless cause as soon as i update it it turns out to be "medium" or above. Why does this happen? It cannot be that every single keyword I search noone cared about 3 months ago, its stuff like "best authentic xyz restaurant xy city". Makes me question how accurate this platform is. I tried others as well, but i don't have 150+ usd to spend a month on this right now. Are there any better tools that are this cheap?