I’m in my final year studying chemical engineering and yeah it can be hard but it is extremely rewarding. There’s alot of physics and maths in it more than chemistry. I think you would struggle if you didn’t do physics A-Level as there are a lot of basic concepts they expect you to know that I learnt in A- Level physics. A lot of chemical engineering is modelling how the world works in terms of maths and physics (fluid mechanics, heat transfer) so I think you should consider doing a foundation year where you can build on basic concepts to have a better chance of getting the most of your degree.