Then I ask you, what damage has the F-35 exclusion really caused that it is irreversible for Turkey? I say none worth mentioning because both Turkey with the S-400 and the U.S. with the non-delivery of the F-35 could walk this line without significant damage to either side.All the rationale you cited was there and more apparent when we were a Tier 3 partner of F35 and a major buyer of the aircraft. And yet that didn't stop the Americans kick our butt from the program. What was our response? Did we use a smidgen of the leverages you said above? At the end we were at begging point to buy 4th gen F16s.
We should also take the state of our economy and its dependence on western ecosystem into considerication when making these grandiose claims. We're not earning our bread from selling to Chinese or the Russian. You severe your ties with the west, you have no alternative to fill the void. It would wreck your economy beyond what you can imagine and any opposition party would win the ensuing early elections against Erdogan.
Both sides had to go this way (Turkey not getting air defense systems from the US or EU) to save face (both sides don't want to show weakness).
Since Turkey is not in an active war at the moment, and you have to be honest about that, the fleet of F-16s with Özgur II upgrades + the current drones is completely sufficient until 2030.
If you add TAI KAAN, Hürjet incl. Naval Version and the new stealth drones later.
A political decision is always carefully weighed against the cards you have and the cards you will soon have. Here the access to air defense systems including technology transfer active/passive was probably more critical, including the benefits of the Russian relationship e.g. Russian tourism, Turkish <-> Russian business in general, and the energy policy in gas & nuclear technology without too strong restrictions as the Western states would expect probably bigger than having a few F-35 in Warehouse and the production of some parts at TAI as business.
I say you have to look at the big picture, in my opinion you got more than you lost. The F-35 is ultimately just a very modern Trojan, where the danger is extremely high that it can be shut down by remote control if it is used against American interests, e.g. conflict with Israel.