My guess is whatever media you read didn't mention that part, huh? But hey, you don't have to trust me. Take the summary in a German TV news report:

A ZDF (German Television) report said: “In Brussels they say that the EU has has asserted itself all along the line. PM May had to swallow a lot.”

Indeed Theresa May repeatedly broke her own supposed red lines. Here's a summary of 40 things in the so-called withdrawal agreement:

https://hrp-historicalreviewpress.blogspot.com/2018/11/the-t...

It contains elements like these:

- May says her deal means the UK leaves the EU next March. The Withdrawal Agreement makes a mockery of this. “All references to Member States and competent authorities of Member States…shall be read as including the United Kingdom.” (Art 6)

- The European Court of Justice is decreed to be our highest court, governing the entire Agreement

- The UK will still be bound by any future changes to EU law in which it will have no say, not to mention having to comply with current law.

- Any disputes under the Agreement will be decided by EU law only

- The definition of UK citizen becomes controlled by the EU i.e. the EU would effectively control British elections by deciding who can vote in them.

- The EU and its employees are to be immune to UK tax law (even if they live in the UK)

- The UK agrees not to prosecute EU employees who are, or who might be deemed in future, criminals

Similar advantages and immunities are extended to all former MEPs and to former EU official more generally

- The General Data Protection Regulation is to be bound into UK law

- The Lifetime clause: the agreement will last as long as the country’s youngest baby lives

- The UK will tied to EU foreign policy, “bound by the obligations stemming from the international agreements concluded by the Union” but unable to influence such decisions

- All EU citizens must be given permanent right of residence after five years – but what counts as residence? This will be decided by the EU, rather than UK rules

- The UK agrees to spend taxpayers’ money telling everyone how wonderful the agreement is

- The EU decide capital projects (too broadly defined) the UK is liable for

- The UK is bound by EU state aid laws until future agreement – even in the event of an agreement, this must wait four years to be valid

- The UK will be liable for future EU lending

etc etc. It goes on like this.

This so-called "deal" was actually written in Brussels, by the EU, and Theresa May agreed to it! The only reason the UK/EU are still negotiating is that this attempted deal was so terrible even a Remain-dominated Parliament couldn't agree to it.

Of course May resigned eventually after trying three times to get this agreement through Parliament, and there was a leadership change.

The EU had originally insisted that given the original goals of Brexit, the only possible outcome sans compromise was a Canada-style deal. They even made a helpful slide that showed this:

https://twitter.com/Number10press/status/1229893225663602693

At the time Theresa May felt that was unacceptable, hence the use as a pressure tactic. Johnson felt differently, and the EU wasn't willing to negotiate in good faith anyway, so went back and said "fine, we'll take the Canada deal". So Barnier changed his mind and decided actually a Canada-style deal wasn't an option anymore.

It's just time wasting nonsense at this point. The EU is rejecting options it has itself proposed. It's bad faith and the UK should walk away.