Concentration seems to be more of a hindrance in this game than i think it is meant to be because of a few factors.
First, I have a real issue with Larian turning a couple of status effects into "miss turn, break concentration", when they are not supposed to. Prone should not break concentration, stun should not break concentration, you can still concentrate and have a limited turn when you are stunned or prone, but not in this game it seems. Things that do break concentration: being downed, being incapacitated, casting another concentration spell, failing your con save upon taking damage.
Second, by their own admission, larian have beefed up some of the enemies in this early part of the game, so if it seems like they are always saving out of effects, its probably because they are, their saving throws are higher than they should be. Also, environmental damage everywhere means more concentration checks, and you will feel like you're failing more often due to rolling more often. Its not a good combination.
Third, it seems like spells that should have their saving throw happen at the end of creatures turns, are happening at the start. I've not done a lot of testing on this, but I've noticed it, and seen at least one other person complaining about this. This shouldn't be a thing, spells like hold person should have their targets make saves at the END of their turns, not the start. Maybe it's an issue with EA, maybe they can't manage coding rolling saves on turn end?
Lastly, concentration is a hindering issue in 5e, you are not wrong about that. Spellcasting has had some limiters placed on their casting due to lingering 3.5 power creep issues. Earlier editions didn't have concentration and they also had issues with spellcaster power creep, as in after a certain point, unless you had min maxed your mundane class build to hell and back, spellcasters were usually the strongest characters. So we've been saddled with concentration, which i personally don't have too much issue with, but also with really restrictive changes disallowing multiple spells being cast per turn, prohibiting the casting of two non cantrip spell per turn, even if one is an action and one is a bonus action (i personally dislike this rule and don't enforce it when i DM).
