What evidence is there that they were shot down by Patriot? I find it unusual that Ukraine would broadcast this information.Well, probably precisely to set up such an operation?
Blindly rushing more aircraft into a SAM trap isn't SEAD, it's suicide.
Also, as a rule of thumb, those raids include HARM cover(Su-35 typically). Something is now clearly wrong with it - but we don't know what.
Maybe L-150 RWR is inadequate against Patriot. Maybe (quite likely), 1 HARM, while enough to split the attention of older S-300PS, doesn't really affect Patriot engagement (it just engages that single missile in the process). Maybe, maybe, maybe.
Or maybe it's just a special case of lucky engagement for ukrainians - and there were many more attempts like this during the last half year - but we only get to know about successes.
Let’s not forget that Ukraine has received the much more capable French SAMP/T system with an AESA search&track radar and active radar homing Aster missiles.
Hypothetically,these can be fired in cooperative engagement mode with midcourse guidance from NATO AWACS aircraft, giving near zero warning time to the Russian Sukhois which are accustomed to being tracked by AWACS. By the time the missiles go active it is probably too late to evade them.
Or it could be that the Sukhoi’s RWR does not deal well with the Thales Arabel LPI AESA. Just some food for thought.