Part of the problem is that in tabletop, the early encounters are easier, and getting the first 5 or so levels comes in a few sessions at most tables. In BG3 EA, you live the entire experience at less than level 4, before much power is accumulated, and for a long time. This is compounded by the existing balance issues (fights where a boss monster keeps summoning more minions vs limited resources, being massively outnumbered in nearly every encounter with no regard for encounter sizes relative to challenge ratings, missing or broken options compared to what is possible in 5E usually, etc). All of which makes characters feel weaker than they would be in 5E tabletop. Larian has not implemented 5E faithfully enough, only taking some parts, and changing others, and have misunderstood that careful balance that 5E establishes because of it. I like Larian, and appreciate their games, and truly hope they can use EA to correct these issues.