No need to get like that. I have no idea what your inspector had access to or what he might have seen and your first note did not elaborate. Not all houses have attic access unless you start cutting holes in the ceiling. An inspector won't do that. Sounds like you got ripped off and that's a shame.

There can be many hidden conditions in older houses that would/could never be observed in a 2-3 hour home inspection. If you like the house enough to buy it, then you have to deal with the eventuality of making major repairs - that just goes with home ownership - and new homes and older homes alike are just as prone to have major problems.

His liability is probably limited to the amount charged for the inspection so he has little to lose if he misses anything.