Mum's bf annoys me, how do I deal with it?

So last September, after mum's divorce last year, we moved into her boyfriends house. At first it was going well - they were both happy - but problems soon developed when we all went back to work/school. They have both long hours, so me and my brother are set to clean the house and on occasion cook (which I can understand) however, very rarely do we manage to do it to his standards. He's one of those people who doesn't tell it straight to your face instead they complain repeatedly; for example, we have a black lab who sheds, I hoover every couple of days and yet he continually moans that there hair on the carpet and even redoes the job despite the fact that I have literally spent 15 minutes hoovering up as much fur as possible. So anyways, one of his pet peeves is not answering the phone, unfortunately I lack confidence and believe that there is little point answering the phone when I know it's not for me and going through all the who-ha of 'he's not in at the moment' 'i'll call back later then' (from my point of view it makes sense, but I can see why it would be annoying) so, I got moaned at about that (comparing me to his sons I guess ((who are lovely by the way, I get on with them well)) in an attempt to improve I started answering the phone as much as I could whilst in the house; however today the phone rang whilst they were in the house and instead of them getting up and answering the phone, I was shouted out for not picking it up... last time I checked I wasn't your slave, it would actually save time if you picked it up! I might be over-reacting, but regardless he p's me off at the best of times; I've recently started sixth form and am already behind on coursework so I could probably do without the added pressure, I have to remind myself that in two years time, I can move to university, usually that helps but sometimes it gets to much. If anyone has gone through this and has any advice, it would be greatly appreciated.

I'm really sorry to hear your experiencing this problem especially when your doing your most important year. It's funny when we face stressful situations and look for the answers from others when we already know the answer to our problem such as you said you are going to Uni soon so so get a caldender and mark down the days left to go before you leave. You could also try talking to your mum about how you feel, when you talk to her used I statements. Such as I feel ..... When .... Yells at me for .... These statements don't make personal attacks ...another solution is to get an answering phone however I suspect there is more going on than just not answering the phone. Remember when ever we go through things we choice to percive it as a positive experience or negative. Positive thinking reduces stress, you live longer and reduces the risk of developing depression. If I were in your shoes I could see lots of positives, one of them is that when you move to Uni you would have already learnt the skills required to live with difficult people. Also, reaching out for help to get support when your in a sressful situation is a strength you have. That's another positive good luck with everything. And one good quote I read was what ever your stressed and upset about today in six months time it won't matter because you will be stressed out about something else