I’m Orthodox.
Yes, I’ve heard varying opinions. But usually those that denounce (whatever) outside of Orthodoxy are rather zealous Protestant converts (often still newish) who quote Saints from back before 1054 who are referring to heretics outside the Church. Or some fairly insular ethnic priests, sometimes, who seem not to have a lot of exposure outside of very close circles.
As far as I can determine, the proper Orthodox approach is - we don’t judge outside our own communion - we know where the Church is but we don’t know where it isn’t - and we don’t presume to limit God in how/where He chooses to bestow grace. Likewise we don’t assure grace outside of Orthodoxy, but then again the grace of Orthodox Sacraments can be prevented by the wrong disposition of the person receiving them.
We don’t consider Catholics to be part of our Church, and due to doctrinal/dogmatic differences we can’t fully affirm them. This applies to the apostolic succession as well, since doctrinal fidelity is also required. But is there grace in Catholic Sacraments - officially? You will find differences. However, it is generally accepted that Catholics cannot be re-baptized and at times I believe have been received simply through profession/confession. Generally though Chrismation would be required since it is slightly different, I believe, from Catholic confirmation.