Most likely it will be like that especially with $16 left in hand so it would be better to look for other gambling alternatives and switching to that sportsbook seems pretty good.

Doing with BTTS I think it is quite more convincing for the semi-finals this time although it cannot be denied that for these 2 matches it will be very difficult to determine but overall I am also doing the same thing as what you are doing right now.
Not without reason, but for the Arsenal and PSG match the possibility of them scoring in the first leg will be very possible to happen so BTTS is a fitting place to bet rather than 1x2. Although it cannot be denied that for now Arsenal is also quite strong in terms of defense but looking at PSG's matches in the Champions League then I think we are also aware that PSG can always score at least 1 goal in the first leg.
For Barcelona they are currently the favorite but Inter is also not a small club just for now Inter's problems are still not completely solved for finishing problems, I prefer to be on the handicap for this match compared to 1x2 like you did.