Huh? I don't follow the Bundesliga much but from what I have seen of him, he has had quite a few howlers. Unless I remember wrongly, he was poor against Sevilla and Wolfsburg.
That's the problem. He is a backup player, not first 11 quality. Since Bayern knew early that Neuer will be out for the season, they could have got someone more reliable.
As for the CL Final, I don't think Liverpool stand much of a chance. Liverpool's front 3 is great but a defence which contains a 19 year old and Dejan Lovren is going to concede quite a few.
Ulreich has done an amazing job overall this season. You're right that he made a mistake that cost us the game (we drawed) vs Wolfsburg but iirc this was the first game after Neuer's injury, so he really lacked practice in that game. I don't remember any significant mistakes vs Sevilla. In general he's of course no Neuer, especially not in his passing game and dominance in the box, but he is a great goalie on the line and his reflexes saved us a lot of games this season. The mistake vs Real is of course incredibly dumb, but I think that can really happen to anyone in such a game, I wouldn't blame him too much for that. I agree with Dunk that there is definetely no better No. 2 available to us.
On Bayerns squad next season, especially on the winger issue: It really depends on whether Robben will extend his contract or not. If he extends it, then our squad pretty much stands for the next season and we'll just sell a few players. If not, then we'll probably sign another winger, probably a talent like Pulisic, Bailey or Thauvin (I know he isn't really a talent anymore). On the wings we would have Coman, Gnabry, Ribery and Robben / newcomer then, with Müller as an option there too, in a more asymmetrical system then. Pretty much all of them except for Müller are really prone to injuries, so 5 players for 2 positions are definetely needed.
As for departures, I'm pretty sure Sanches (who's on loan atm) and Vidal (linked to Atletico and Chelsea) will go, because atm we have more than enough rather phyisically orientated midfielders. Our midfield would be Thiago, James and one out of Martinez / Coco / Goretzka then, with only Rudy as clear backup.
As CF Lewy will still be the man to go with Wagner as backup, as I'm pretty sure the former will (have to) stay.
The defense is also pretty much fixed, maybe Rafi or Bernat will go, then we would have to find new backups. Alaba and Kimmich are our first options on these positions of course. As for Centre Backs, there were rumours about Boateng, but I'm pretty sure he'll stay now. Then we'd have Hummels and Boateng with Süle as our first backup and Mai as a promising youth player.
In general, I think this squad should definetely win the league again, even if Kovac really fucks it up. As for the Cl, that really depends on Kovac and how he'll handle the whole situation. With some luck and good coaching (which I'm sceptical about) we should have a shot there, too.