I'll chime in with others, whether or not the seller knew, you paid for a home inspection, apparently with a specific clause for termites and their damage? This shouldn't be something that can be covered up in the eyes of a competent inspector. Especially if the inspector was recommended by a real estate agent, rather than hired by you, they should be held fully responsible. These people will gloss over faults in order to get repeat business from the agents. The fact they already paid for remediation is telling.