You're beginning to appear hysterical. Calm your tits.
There's a difference between being annoyed by psi and 'having trouble' with it. I resent the implication of the latter.
Yeah, because you KNOW that the AI is incapable of using indirect fire, smoke or snipers. So it is gamey, as in exploit-y. Sure, I don't have anything against exploits, every game has them, I just want to make camper's life even more miserable than it is (how many hours it takes for you to play a large mission?). So maybe some people will stop camping and wasting their valuable lifetime.
Using effective, and tried and true IRL tactics isn't gamey simply because the AI can't cope well with them; mass demolition is what Israel uses against Palestian fighters for example in lieu of exposing their troops to fire and IEDs which is effective in achieving their military objectives with minimal casualties (despite the averse longer term hearts and minds/political/ethical ramifications); likewise with Vimy Ridge; likewise with the Iraq War (which became a clusterfuck only during the occupation); so it is in Piratez/X-Com.
As for large missions, it generally doesn't take long unless there's a lot of sight/LoF blockers because of explosives, and even then if I feel like burning through even more explosives to demolish those obstacles wholesale, it will still go by relatively quickly.
What's the alternative anyways? Spamming smoke and then charging into melee? The fact is the optimal strategies are always going to crush the AI with minimal chance for it to retaliate/defend itself. X-Com is all about minimizing risk, and any strategy that takes on undue amounts is destined for failure long-term save maybe on the lower difficulties.
Lemme use your style of argumentation. With such invis range on units with ranged weapons, you'll get randomfucked by their reaction fire. Or - if you employ super-detection - you will destroy them like babies. Where is the fun in 100% predictable result? Where is the skill? Where is improvisation? Really, go play chess, not wargames.
Chryssalids (which we are discussing) sure are capable of reaction fire. As is, Ethereals are pretty bad for this, yes and force you to spam even more explosives and the Ayephone which is even more tedious and boring than the standard optimal strategies/SOP. By the way, achieving the happy balance between having to get too close and getting to detect from too far is achievable, and given how far away enemy units can see you, unless you're giving a unit close to regular viewing distance vs invisible targets with a counter item, RF is still going to be a problem, it's just that finding and killing invisible units won't be as hopelessly tedious.
Sure, such units are both planned and already in (power armor, tank, etc). Easy-peasy, you don't need to teach me how to make a tank, bro.
Current power armoured units and tanks are easily defeated with powerful explosives and weapons regardless of the striking angle, even if multiple hits/explosives are involved.