Without looking at it again, he seems to contradict himself, first defining "falling away" and then latter changes that to "departure"????/ Way back I searched in this area in depth = falling away.
"THE" falling away = a huge event = from around the 100's = this man of lawlessness was created and accepted = another Christ. = John 10:1 ATM by most. Look no further than John 1:1 = Father IS The Word and the Son no way literally enters John until 1:14, where he via 1:13 = Baptism becomes a Begotten Word of the Fathers as per Heb 4:12. Word God and Word man = 1:14 And the Word man (Flesh) became = (arrives) and dwelt among us and we beheld the glory/word of Him, glory/word as only begotten by the side of the Father, full of grace and truth. (by the side - Due18:18, Luke 2:40,52, John 17:8, 17:17, 17:22 = Glory/Word and Spirit/Word without measure John 3:34)
1:14 is NOT = And the Word became man = another story.
In this area (2Thes 2:1-3), he, nothing else but ASSUMES two things immediately follow = with NO support whatsoever = it could be many years apart, but on the whole as we have now, only known by a Few and growing, as per Matt 7:13,14.
You need to get serious and search you/tubes on Tribulation verses God's wrath = two totally different events. The 1st 6yrs are the tribulation = Satan's wrath, as he knows he only has a short time = Rev's and the last year, which is all 'said' Christians are spared from, is God's wrath = Rev 10:7 = end of the 6yrs. ................ But trust me, the hardest part of it all, is being able to stand back on your current views and objectively look at others.
I'm telling you mate, that ATM, John 1:1 is the oppositions great gottcha moment = thousands of new Eve generations running a muck LOL. All going well, mid the 7yrs - a grand Pentecost repeat after the 2 witness's, which I expect are the 2 x 144,000?? Goodness me, John 1:1 is like placing a white piece of paper before people and they mysteriously go - NO, No = 2 Thes 2:11 = only plausible answer for this absurdity.
2032, if I was to pin a time, would be it - 7yr end.???