Too much javascript
Yes: got them.
The problem is the web sites that insist on using 3rd party javascript. I will, generally, allow javascript from a site but do not from other sites. If a site does not work without 3rd party stuff - I go elsewhere.
The trouble is that the web masters don't get to know about them losing me, sometimes they don't care. Yesterday a web site would not work without 3rd party javascript, so I emailed the company to ask them to 'phone me for an order. They refused and said that no one else had complained about the javascript - I emailed back saying that I had bought whatever elsewhere.
Unless companies know that they are losing business they will not do anything. So: please, everyone, tell the companies that you walk away from.