Yes. Anti-market behavior is the usage of monopoly (or near monopoly) to destroy competing companies after the fact with underhanded tactics and is generally agreed to be a Bad Thing.

Apple's behavior when setting up iOS could be construed as anti-market, but the fact is that market never existed. Ergo if you setup a company to make a web browser for iOS, you can't claim anti-market behavior because the policy in question predates your company. You effectively attempted to enter a market that does not exist.

If it's proven there isn't a technical reason why iOS can't support other browser engine (like there wasn't in the Windows vs. Netscape case), a judge could rule the artificial ToS terms should be lifted.

This happens every time a platform becomes too important/powerful. If Apple smartphones were niche devices with a very small user base, nobody would care. But they now have millions of users and are clearly a general purpose computer, so they will go under increased scrutiny. It's the price of success and they will sooner or later have to play by the (EU) rules. That or they improve Safari so few people have a reason to engage in lawsuits with them.