No, “men” aren’t harmful any more than “women” are, unless you are completely delusional. People don’t assume that random “men” are going to hurt them unless they have serious problems, or living in the active war zone. This over-dramatization doesn’t help anyone and isolates you from absolute majority if you really think that way. You can isolate yourself, just don’t act like it’s normal in any way.
Unless you are an asshole, why would you say that you are asshole, if you aren’t sure you can ask. Statements like ‘I don’t hate myself, but actually I think that I’m an asshole because someone else is’ are somewhat conflicting.