Nothing unusual there, with the tactics you are using, except using high pressing as a default tactic. 1st, it uses up condition faster, which makes the players slower into the tackle and more liable to foul, second the opposition get wise after a while and will start using long shots which tax your keeper into making mistakes.

I always start matches with low pressing until I've got the measure of the opposition - if they have fast forwards or start long shots early on, high pressing is a no-no. I only use high pressing if I'm in attack mode looking for a result - either I'm losing, it's a tactical shift to get an advantage, or to increase an advantage over a weaker team.