There's not a straightforward consideration of what is jargon, what is slang, and what is argot. Some linguists use the terms synonymously and some have strict theories of categorization, but there's no universal consensus.

In any case, your language here would certainly run afoul of the "simple English" the OP is espousing, and the OP terms such things "jargon", so contextually, yes, it's jargon.

Although personally I agree, the OP is using a particularly sloppy definition of "jargon", which often has a stronger technical connotation than merely metaphorical or business newspeak language.