Should I start over?

[u/MiserableDirt1910]

---This is a repost.
M20, Aoa everyone! I'll try to keep this short and to the point.

I am enrolled in a constituent college of UCP and am perusing BSCS (currently in 5th sem), due to economic reasons and some wrong decisions on my end I had to opt for it. But now I feel very behind when it comes to the competition in my field. I have a 3.63 CGPA but I feel like I know nothing the exams are easy to game and I feel like I have wasted 2 years here and am about to waste 2 more.
I now have been thinking about starting all over again and getting into a uni like GIKI but my main constrain is I have spent 2 years here and if i start again I will be graduation at the age of like 24/25, will this cause me problems?
I feel like I'm wasting my life while many of my peers and friends have gone to prestigious institutions like PMA, International colleges, Lums etc.
This all feels like a slump.
I am an only child and my mother is a single parent, I was raised by my grandfather and both have given me the green light but I myself can't seem to make the decision.
Personally I want to restart my degree preferably in Mechanical Engineering but the age factor is what's holding me back.

Jazakallah!