Yeah, software patents in the US especially, have become a way for companies to either kill competition, or make buying up ridiculous patents and suing for infringement their primary source of income.

Primary issue is the patent office has few officers that are technical enough to understand the overlap of the specific industry and software. So, they tend to just allow anything, especially from larger companies that they're told to assume have the expertise if they don't since their load is too large to have time to learn new stuff and truly research if something is obvious or not.