The problem with Truss is that she has nothing to fall back to career wise for the rest of her life. Apart from that outrageous PM pension she has nothing to do to pass her time. Because anytime she wants to get even loosely involved in politics, the lettuce will remind her of her last attempt. And I'm absolutely fine with that đź‘Ť.
Boris was entertaining and in comparison to Truss, actually seems to be a decent prime minister. As disastrous as Brexit was, some of his immigration policies were an improvement from Theresa May's
It's all she can do. She could try to parlay her political experience into management or consultancy, but it's clear to everyone that she was ultimately very bad at everything except climbing the greasy pole to the top of an organization full of unpleasant weirdos. Once she had the responsibility to lead in the wider world, she revealed herself as clueless.