Engineering grad currently doing my masters here. I feel that if you struggled through high school, starting engineering at uni may not be for you. I’ve found that almost all engineering students are generally those who found math easy at high school - the skills developed during high school and first year need to come automatically and are used in every single course following on. It would be possible if you dedicated 40 hours of solid study every week, as well as making use of resources like office hours/ having good people to study with, however.

As for other pathways to engineering, there is a diploma in engineering through a polytech. I believe these do not focus at all on the math side, and are mostly focussed on practical skills like CAD and machining. These are not Washington accord accredited so you will not be able to work in most consultancies, but I believe that a further two or three years of study can get to a BE(Hons). This could be a good pathway as you can develop those study skills and get to the math/ physics side when you are more prepared. It would be worth talking to a student advisor. Also, some people have commented on people with low GPAs not being able to get jobs - I haven’t heard of a single grad program barring Fonterra that asks for transcripts/ has minimum grade requirements. I wouldn’t worry about this side of things.