There are a lot of things I don't like about Theresa May and her politics but I don't hate her.
I think she stepped up when no one from the leave camp fancied the job thinking it was an opportunity to get her name in the history books by guiding the UK through the rocky waters of Brexit and out the other side to a strong and stable future (har har), uniting the country in the process.
Unfortunately, she's just out of her depth and doesn't have the necessary knowledge and political skill to achieve that.
She doesn't have the kind of knowledge of both (a) the EU/international trade law and (b) the history of Northern Ireland that you would need to have in order to understand exactly what is at stake here. If she had had that kind of knowledge from the start, she would have realised what an impossible situation we are in. She wouldn't have drawn "red lines" which were fundamentally incompatible with each other and made promises she couldn't keep, such as saying we would leave the single market and customs union, but keep the Irish border open.
She also doesn't have the political skill to sell soft Brexit as not just an acceptable compromise but indeed the only workable solution. If she had that kind of strategy and charisma, she would have stood up at the start and said the UK was considering its options and was ruling nothing out until further analysis had been done. She then could have come back after a few months and said that a soft Brexit was realistically the only way to respect the referendum result whilst also taking into account the fact that it was almost evenly split between leave and remain, and that she also had to consider the likely economic impact of a hard Brexit, as well as the implications for Northern Ireland and the Scottish independence movement. But she didn't have that kind of political skill. She was pressured by the hard Brexiters in her party into committing to the kind of Brexit they wanted, under the threat of being deposed if there was even the slightest hint of "betrayal". She might have called the general election in order to buy herself a bit of freedom from the hard Brexiters in her party, but unfortunately it massively backfired. She hugely underestimated her own political appeal, and since she had already laid out her plans for a hard Brexit and triggered Article 50, remainers voted against the Tories in droves, putting her in an even worse position than she was in before.
I think her intentions were more or less good at the beginning, but now she has painted herself into a corner and has no fucking clue how to get out of it. And because she's not brave enough to stand up in front of the country and admit that we as a nation, she as a Prime Minister, the Tories as a party, Parliament and to a lesser extent the electorate have massively fucked this up, it looks like she's going to let us go off the cliff edge with no deal and then try to pin the blame on the EU for not doing a deal with us.