I'm definitely qualified to give advice here. I started A-levels doing Physics, Maths, Computing and Chemistry. Chemistry proved not to sit well with my brain, causing me lots of issues both academically and mentally, so I eventually ended up dropping it. Ever since then, all of my grades have improved, with maths improving drastically (B's up to CONSISTENT A*s). Dropping chemistry was one of the best decisions I've ever made for my academic career, and I'm sure dropping a subject would be good for you too.
Personally, I'd say drop ICT. You love computer science, so that's already a no-no to drop. Maths is a very well looked upon A-level, and can get you many places regardless of the other subjects you take. Physics is basically applied maths with a tiny bit of theory, so if you take maths its a no brainer to take physics. ICT only really ties in with CompSci, so its the safest to drop to ease the workload and improve your grades.
Don't stop doing an A-level you love because of bad grades. If you love it enough, use that motivation to really nail down those grades and go on to study what you want at Uni.
Just my opinion tho lmao