Managers are good for managing account but not people, Horrible HR - SEO Executive Found (UK) Employee Review

I worked here in 2020. My manager was skilled at their job but lacked people management skills. As a junior employee, I was assigned tasks without any support and was expected to either complete them on my own or figure out how to do them. This was incredibly frustrating for me. The HR was ineffective. When I shared my concerns with her about the managers lacking people management skills, she listened but then tried to convince me it was my fault - unbelievable! She even admitted that it was the first time this person had been in a managerial role, which I understand, but she showed no sympathy or understanding at all. I can’t help but wonder how she got into her role in the first place! No adequate support all or address employee concerns in a meaningful way... There was no clear progression path or personal development plan (PDP). While there were a few attempts to create PDPs, it was left up to the employees to develop them rather than the managers, and they were never followed up on. Finally, after taking on so many responsibilities, my promotion and salary increase were delayed. The explanation given was that my manager had left, and the new manager needed time to evaluate my work... seriously, what?