While we don't buy tickets as one group we do still fill a coach and minibus for each match. occasionally it's two coaches, certainly for weekend matches.
While it's definitely better playing home matches on a Saturday, weekend internationals when I started going were more or less limited to the end of season home internationals. All qualifiers back then were pretty much midweek.
unfortunately the current position is unlikely to change while there's TV cash getting splashed around. If the team were doing well then it'd be a different matter. You only have to look at NI and Wales to evidence the upturn in their attendances.
There are fans that support their team no matter and there are some that only attend the "big" games or when the team are playing well but that's alway been the case at all levels of football. And it's up to the individual which I totally get. You only have to look at the boycott thread on here. Nobody has enjoyed recent results/matches but there's a view that a boycott would be further counter productive.
What I mean by that is if a boycott gets rid of the manager what happens when the next imcumbent(s) hit a similar sequence of results? Up to the individual. I never went to the last friendly against England at Celtic Park due to ticket price but that's my personal decision.