I think the reason why you're getting some pushback is because we've heard all these before with another aircraft that had similar teething and development problems: the F-15.
The F-15 project was supposed to be a small and light fighter but feature creep" blew the project up into a massively expensive boondoggle. Some of this was due to the fear of the MIG-25; an aircraft we later learned wasn't so scary.
Yet today, the overpriced, chronic cost-overruning F-15 sits at an impressive 109:0 kill to loss ratio, making it the best performing aircraft in the United State's history.
But you would be correct in saying the F-35 is no F-15. It has a stealth coating that is expensive to maintain (this is true for all stealth aircraft). It also flies with a ton of electronics to function as a "sensor network in the sky".
But in many ways, this is similar to the complaints about the F-15 and its (For the time) dizzying array of modern technologies: An advanced lookdown/shootdown radar, support for BVR missiles, IFF, EW and ECM systems all linked to a central computer. Technically other aircraft had these technologies in the 1970s, but none until the F-15 had them all in the same aircraft. Fast-forward a few decades and that "feature creep" doesn't even quality as "bare bones" for any air superiority fighter.
Anyway, if you want a multi-role aircraft without the stealth or sensor network gizmos of the F-35 there's the Gripen E series. Its purchase price is greater than the F-35 but its operating costs are much less. If you don't envision your country's airforce performing too many SEAD missions this tradeoff might make sense... but there's no free lunch!
