It was due to the wind shear. Wind shear creates a vector gradient. If the vector gradient direction is upward in the head you'll get additional vertical force for lifting and its magnitude is larger than the downward force in the tail. That's will happen only when the high-speed wind is heading towards your plane and your plane take off with a rotational velocity (Vr) designed for a steady condition. As force can be modeled as a rate of change of momentum over time it makes sense that you get a sudden steep climbing pattern because the momentum of your plane has been increased.
Wind shear is classified as an atmospheric disturbance. Therefore, it is correlated directly to the flight qualities. You can check the table in Flight Dynamic Principle Chapter 14 to see the relationship. As long as you can maintain control there will be no problem. For the passenger's complaint, they have the right to complaints as a part of the whole system. A complaint is a gift to improve the overall system the airlines, the pilot skills, and the aircraft manufacturers.
The only thing to be concerned from your case is communications. You should get a weather report before take off. Someday, this communication issue can be reduced by visualizing the wind. I guess everybody would be happy if we are able to see the wind shear. Some airports have the technology to visualize wind shear. It's just the implementation of the Tyndall effect (at least for a while). Maybe in the future, everyone will able to see the wind shear using 3D light technology. The plasma emission technology is the one and only 3D light that we have today and it's dangerous. The plasma emission phenomenon near the cloud full of static electric charge will transform your Airplane to a giant spark plug. For now, just trust the pilot they're trained well. If you're a pilot just trust the aircraft manufacturers they've been work so hard to keep everybody safe and of course, communicate well with the ATC & ground staff.