The regulatory agencies you are blaming (rightly!), are the sock puppets of said corporations. It gets right to the point to say the corporations are responsible.
See for instance, the shamelessly transparent sockpuppetry of the Pai FCC, in relation to big telecom. Verizon have their hands so far up Pai's ass, they can make him do just about anything.
Agencies that are SUPPOSED to work in the public interest are now actively working against it. (EPA, FCC, Copyright Office, etc.)
Your view is also naive of the impact of globalization. It is not efficient nor desirable to pay people to make widgets locally, if workers in another region are able to make those same widgets cheaper.(Say for example, if country A has a wealth of easily collected rare earth metal salts it can scoop up inexpensively, and then use to make computer equipment. It makes no sense for country B to deny country A's less expensive end product, and instead tear up half its real-estate trying to refine enough rare earths to make domestic supplies of the same product.) This causes the market to have these less expensively made widgets in it, which local startups cannot even match on price, let alone undercut. This is a barrier to entry. Theoretically, Tariffs can help with this, but like any self-serving agency, national governments tent to go straight for vengeance porn when the topic is brought up. (See for instance-- China, and technology. They have a massive deployment of factories, refineries, and a strong availability of tech workers, at a bargain basement price to market. (partly due to their Communist top-down control wages model, which holds the prices low, and a command economy which can ensure resource distribution to sustain this reality, even if it is inefficient.) They are able to undercut anything made elsewhere that is tech. The only way to make sure that local producers can compete in the market is to artificially add cost to the chinese made offering-- EG, a tariff. China responds to such a tariff, by imposing its own on what the US does make in abundance and exports-- Software, copyrighted content, and foodstuffs.
This tit for tat in response to rent-seeking is called a trade war, and it has many negative consequences. (See the current shitstorm Trump has stirred up.)
Not all vocations are easy to get a start in, especially when the things that are profitable are naturally expensive to get a start in. (Software development runs foul of copyright and patent protections; There are too many extensions and too many patent/copyright trolls out there to be able to successfully start up an enterprise without sinking the costs of an on-staff legal counsel for this very purpose to ensure compliance. This is outside the feasibility of most ordinary people.)
The current exports of the US are, again, mostly services based (Software, Copyrighted content like movies and music), but agriculture still has a strong presence.
The former requires cost centers that are outside the reach of most people, (and the people who can afford the necessary specialists tend to be predatory, and seek to find ways to procure new content, whether they are actually legally entitled to it or not, and thus rip it out of the hands of the people who try.) and the latter has a natural barrier to entry of requiring equipment and land investment that is prohibitively expensive.
There's a reason why I advocate for the breakup of all these large actors; Once they reach a certain size, they are able to leverage their dominant positions to abuse the market in ways that distorts its natural form, in order to further increase their profits. (See for instance, how regional restrictions work, etc.) This keeps unit prices high, wages low, and profits in the stratosphere. Forcing these actors to become a bevvy of smaller, and less powerful actors causes them to have to work against each other to curry marketshare, which lowers unit prices, increases wages, and lowers profits to modest levels. (the only people that would lose out on it are fatcat investors) It removes these agents from having sufficient monetary and economic power to dictate policies to government, and thus mitigates the power of their lobbying significantly.
AntiTrust needs to go into some serious overdrive in this country. In a very bad way.