Current cycling jackets: less pit/arm/side zippers

Ok, in seeing a lot of the summer/spring light cycling jackets on the market these days, there seems to be a lot less styles with arm/pit zippers or side zippers. Not only that some jackets don't have a back vent.

So I just nearly die in heat when I wear such jackets. In fact, I bought one last year and returned it to store 1 wk. later. I just couldn't stand it from overheating and not able to allow some air to flow into my sweating body when going up hills or cycling into the sun but it's still cool enough outside to wear a jacket.

And I'm not comfortable wearing a cycling jacket that has magnets instead of zippers for strategic ventilation. If magnets were such a great invention we would have seen them on clothing ages ago.