In fairness, that “straining” often comes from both sides more often than not, and what is typically exploited in the more polemically anti-Catholic exchanges is our own inability from the Catholic side to properly present the doctrinal or dogmatic positions of the Church. Recent threads, especially on the dogma of the Assumption, have shown this to be the case, where lack of a common Catholic understanding is painfully apparent. Ironically, a consistently proper explanation of dogmatic declarations, which are rather deliberately and intentionally bounded in scope themselves, could easily alleviate this tension over time.
Perhaps what you see is that heightened level of critical comment when it comes to dogmatic declarations that were made “unilaterally” by the Catholic Church, with the dogma of Papal Infallibility being the summit of that contention. General agreement, acknowledging difference in prespective, is evidenced in charitable exchange on other less contentious subjects quite consistently, here and elsewhere. It is only where a lack of understanding is evidenced that we subject ourselves to excessive criticism.
There is frequent mention of poor catechesis here on the CAF as well. As you may notice, a good percentage of the Orthodox posters here really “know their stuff”, and are quite well catechized on Orthodox thought and teaching. Not that we do not have some well catechized Catholic contributors here as well, but proportionately, they seem to have us beat. Something to ponder …